This Perfect Cupcake Frosting and Filling is known as Ermine Frosting, or sometimes referred to as boiled milk frosting, because it begins with a cooked roux of flour and milk. That might sound incredibly strange for a frosting recipe, but trust me! I’d say it’s the perfect frosting. It’s not so thick and sweet that you need a gallon of milk to get it down your throat. It’s mild and smooth, and light as air. I also love it because it doesn’t take away from a good cupcake like other really rich frostings can. It’s often the traditional frosting used with Red Velvet Cake. This frosting has a similar taste and texture to a Swiss Buttercream, but with way less effort. Try this unique frosting recipe and you’ll be hooked!
Ingredients Needed
This is just a preview of ingredients and method, keep scrolling for full printable recipe.
- All purpose flour
- Milk – Whole milk is best, but I’ve used non-fat when it’s all I’ve had and it actually does work ok as well.
- Butter – Use real butter here!
- Granulated sugar
- Vanilla extract – Or other extract or flavoring oil of choice.
How to Make Perfect Cupcake Frosting and Filling
Step 1: Make the Cooked Flour Base
- The frosting starts out with a mixture of all purpose flour and milk. And even though I’m showing it here being whisked together, I’ve actually found you’ll get a much smoother result if you mix this part in a blender first and then pour it in your pan.
- Now comes the weird part. You’re going to cook this mixture until it gets thick–it happens fast and you’ll want to have a rubber spatula and constantly smash/stir it to keep it smooth. I usually take it off the heat when it looks like this photo above. There are still some wet spots but as you stir it all comes together like this: Don’t taste it. It’s not frosting yet! Pop it in the fridge; it needs to cool completely (I sometimes pop it in the freezer if I want it to cool fast.) Put it in a bowl and smoosh it around and stir every few minutes to cool it off.
Step 2: Mix it up!
- When the flour mixture is chilled, place some real, high-quality butter (definitely no margarine) and granulated sugar (not powdered sugar!) in a stand mixer. Whip it up for a few minutes so it’s light and creamy. I use the whisk attachment on my Kitchenaid, but any paddle should work.
- Then you’ll add that glob of flour. I know. Weird! I’m warning you right now it’s going to look weird at first. Like, what the heck did I do weird. But keep going. You’ve got to whip it for a long time for all the sugar to dissolve and everything to come together. Don’t be startled if it looks curdled. Eventually it will look like fluffy soft clouds of heaven. I usually give it a little taste and if I can still feel quite a bit of granulated sugar I keep on whipping. Sometimes it takes 5 minutes, other times I let it go for almost 10 or so! It’s worth it for this silky, fluffy, magical mixture. Pipe it or spread it or fill it or whatever. Anyway you eat it, it’s fantastic.
Storing and Other Tips
- Store finished frosting or frosted desserts, covered tightly, in the refrigerator. Allow to come to temperature for 20-30 minutes before serving.
- If using frosting within a few hours of making the frosting or within a few hours of frosting cakes or cupcakes, simply cover and store at room temperature until time to serve.
- This frosting can be soft or even melt if it gets too warm. If needed, pop the whole mixing bowl in the fridge for 15 minutes and rewhip to help it hold its shape.
- Don’t leave frosted desserts sitting in the sun or in a warm environment for too long with this frosting or it may soften/melt!
Additional Tips
- Use real butter, and a good name-brand. Cheap butter does weird things.
- If you beat for the 6-8 minutes and the mixture still looks strange, beat longer and at a higher speed if you can. It should come together, but it takes a little patience!
- I personally think this frosting is best eaten fresh. You can store for a few hours at room temperature, or try storing in the fridge overnight, letting it come to room temperature on its own, and then re-beating to fluff. If you want to frost cupcakes or a cake the day before, refrigerate and just let come to room temp after.
- Add extracts to your hearts content; lemon and almond are both wonderful! Food coloring is also okay.
- The white sugar can be exchanged for brown. Try 1/2 white 1/2 brown for a warm caramel flavor.
- Do not try to make other substitutions or additions. Sour cream, fruit purees etc. can do disastrous things. Some people have had amazing success, just experiment at your own risk.
- If trying to decide whether or not to double it- double it. Chances are you’ll want more. It’s a rather small batch, but on purpose.
- 1 batch will not look like much, but it can spread on (just with a knife, a normal amount) 24 cupcakes. If you want to pipe it thick, definitely double it.
- Looking for Chocolate? This Chocolate Frosting isn’t exactly the same, but very similar!
Frequently Asked Questions
Can I use brown sugar instead of granulated sugar?
Yes. Brown sugar gives this frosting a deeper, almost caramelly flavor. Just be sure you’re using fine brown sugar (some brands like the organic one sold at Costco have quite large grains) and it may help to sift it first. When creaming with the butter, give it some extra time and make sure the sugar has dissolved well before adding the flour mixture to ensure a smooth texture.
Can I make this frosting other flavors like chocolate?
This frosting is best flavored with extracts or flavoring oils. If you are looking for similar flour-based frosting, try this Chocolate Frosting.
Can I make this ahead of time?
Yes. If making just a couple of hours before use, cover tightly and store at room temperature (if your kitchen isn’t too warm) until ready to use. You may need to rewhip it before use.
If making a day or two in advance, cover tightly and store in the refrigerator. Before use, bring to room temperature and rewhip briefly to restore texture.
Can I add food coloring?
Yes, add gel or paste food coloring (not liquid) when you add the flour mixture.
Perfect Cupcake Frosting and Filling
This light, creamy, dreamy flour-based frosting is THE perfect cupcake frosting and filling!
Servings 1/4 cup servings
Ingredients
- 3 tablespoons all-purpose flour
- ½ cup milk whole milk is best, but I’ve used non-fat when it’s all I have and it’s actually fine
- ½ cup real butter slightly softened (I prefer salted, but you can use also unsalted and add salt to taste)
- ½ cup granulated sugar
- 1 teaspoon vanilla extract or other flavor if you wish
Instructions
- Whisk together the flour and the milk (you could also run it through the blender first). Heat in a small sauce pan on medium heat.
- Whisk continuously until it starts to thicken. Let it cook, while stirring with a rubber spatula, until you can start to see the bottom of the pan. Continue to cook until mixture has the consistency of thick pudding or paste.
- Put mixture in the fridge and let it cool completely; it's fine if it stays in there long enough to get chilly, you just don't want it warm at all. As it's cooling, feel free to stir it occasionally to speed up the process and keep it from forming a crust on top. You can also do this quickly in the freezer, just keep an eye on it so it doesn't freeze.
- Using the whisk attachment on an electric stand mixer, beat the butter and the sugar for a minute or two until well combined and fluffy. While beating, add in the thickened milk mixture, any food coloring, and the flavor extracts. Beat to combine and then scrape down the sides. Mixture will separate and look messy, keep beating! Continue beating until mixture comes together and is light and fluffy, about 7-8 minutes, but time varies. Take a sample of frosting between your fingers; frosting is done when light and fluffy and sugar granules are dissolved.
Notes
- Store finished frosting or frosted desserts, covered tightly, in the refrigerator. Allow to come to temperature for 20-30 minutes before serving.
- If using frosting within a few hours of making the frosting or within a few hours of frosting cakes or cupcakes, simply cover and store at room temperature until time to serve.
- This frosting can be soft or even melt if it gets too warm. If needed, pop the whole mixing bowl in the fridge for 15 minutes and rewhip to help it hold its shape.
- Don’t leave frosted desserts sitting in the sun or in a warm environment for too long with this frosting or it may soften/melt!
- Use real butter, and a good name-brand. Cheap butter does weird things.
- If you beat for the 6-8 minutes and the mixture still looks strange, beat longer and at a higher speed if you can. It should come together, but it takes a little patience!
- I personally think this frosting is best eaten fresh. You can store for a few hours at room temperature, or try storing in the fridge overnight, letting it come to room temperature on its own, and then re-beating to fluff. If you want to frost cupcakes or a cake the day before, refrigerate and just let come to room temp after.
- Add extracts to your hearts content; lemon and almond are both wonderful! Food coloring is also okay.
- The white sugar can be exchanged for brown. Try 1/2 white 1/2 brown for a warm caramel flavor.
- Do not try to make other substitutions or additions. Sour cream, fruit purees etc. can do disastrous things. Some people have had amazing success, just experiment at your own risk.
- If trying to decide whether or not to double it- double it. Chances are you’ll want more. It’s a rather small batch, but on purpose.
- 1 batch will not look like much, but it can spread on (just with a knife, a normal amount) 24 cupcakes. If you want to pipe it thick, definitely double it.
- Looking for Chocolate? This Chocolate Frosting isn’t exactly the same, but very similar!
Nutrition
Serving: 0.25cup, Calories: 112kcal, Carbohydrates: 10g, Protein: 1g, Fat: 8g, Saturated Fat: 5g, Polyunsaturated Fat: 0.3g, Monounsaturated Fat: 2g, Trans Fat: 0.3g, Cholesterol: 21mg, Sodium: 65mg, Potassium: 21mg, Fiber: 0.1g, Sugar: 9g, Vitamin A: 256IU, Calcium: 15mg, Iron: 0.1mg
Calories: 112kcal
Cost: $4
Did You Make This Recipe?Snap a picture, and hashtag it #ourbestbites. We love to see your creations on our Instagram @ourbestbites!
Questions & Reviews
Made this tonight and it was so delicious! I'm very glad I found this recipe, and your site. I'll be stopping back again for sure. Cheers!
FYI, one batch of this is enough to fill the chocolate cupcakes, and doubling it is enough to fill and frost them if you choose to do that instead of ganache. Yummy!!!
By the way I use butter if I want more of a wedding cake icing and margerine if I make a devils food cake. Just as good!
I originally recieved this recipe from my mother. We call it wallpaper icing. Due to when heating the flour and milk in a sauce pan till it resembles wallpaper paste. It has always been the favorite recipe at our house and when I take it anywhere!
Glad your sharing it!
You were right, doubling was enough. I ended up making this twice. The first time I used a lot of organic food coloring that unfortunately changed the taste. So I re-made it and used less food coloring and more vanilla. Our ladybug cake wasn't very red, but it was very tasty. Thanks so much!
You just need 3 cups of frosting total? I think doubling might be enough, and x 3 should give you more than enough.
I need 3 cups of this to dye red (organically of course) for a ladybug cake, then I'm going to use it to fill the chocolate cupcakes. Any idea if I should make this x 4 or 5? Thx!
Fantastic! Very light and creamy. Worked the very first time I tried it and every time since. Definitely a keeper! Only thing that could be any better would be if it were more white instead of off-white- but that is what you get when you use butter. This is now my go-to buttercream frosting recipe. Thank you for this terrific recipe!!!
I made this recipe today, I even used walmart's butter. It came out perfect! Creamy, silky, fluffy and almost like whipped cream! I made yellow cupcake and used this recipe for its filling. Yummy!
I made this frosting today for my daughters and my birthday cake. I will admit I was a little nervous, but it was really easy and turned out great! I doubled the recipe and had no problems with it at all. It got rave reviews by everyone. My ex-husband said it was the best frosting I've ever made, and one of my friends, who does cake decorating like a professional said it is now her favorite frosting. Thanks so much!!