Funfetti cupcakes are vanilla cupcakes with rainbow sprinkles folded into the batter, so every slice shows color throughout — not just on top. This from-scratch version takes about 50 minutes start to finish and makes 12 cupcakes with a simple vanilla buttercream. The real reason to make these instead of a box mix is the texture: a properly creamed butter base gives you a softer, more tender crumb that holds up well under frosting.
The short version of why this works
Two things actually matter here. First, creaming the butter and sugar for a full 3–4 minutes builds the air structure that keeps these cupcakes light — stopping early gives you a denser result. Second, alternating the dry ingredients and milk in thirds (starting and ending with flour) prevents the batter from curdling and keeps the gluten from overdeveloping. Both steps are easy to rush, and both show up clearly in the finished cupcake if you do.
Mistakes to avoid
- Using cold ingredients: Cold butter won’t cream properly, and cold eggs can cause the batter to break into a greasy, curdled mess. Pull butter, eggs, and milk out of the fridge at least 45 minutes before you start.
- Overfilling the liners: Two-thirds full is the ceiling. Go higher and the cupcakes dome unevenly, crack at the edges, and are harder to frost cleanly.
- Adding sprinkles too early in the mix: Fold them in at the very end with a spatula — just 6 to 8 strokes. The longer sprinkles sit in moving batter, the more color bleeds into the crumb.
- Frosting warm cupcakes: Even slightly warm cupcakes will melt buttercream on contact. Give them a full 30 minutes on a wire rack, and if your kitchen runs warm, 10 minutes in the fridge before frosting helps.
- Sifting the powdered sugar for frosting but skipping it: Unsifted powdered sugar leaves small lumps in the buttercream that don’t smooth out no matter how long you beat. Sift it — skip the garnish of extra sprinkles on the sides of the cupcake instead, since they fall off anyway and just make a mess on the plate.
Storage and freezing
Frosted cupcakes keep at room temperature in an airtight container for up to 2 days. After that, move them to the fridge, where they’ll stay good for another 2 days — just let them sit at room temperature for 20 minutes before serving so the buttercream softens back up. For make-ahead baking, freeze the unfrosted cupcakes in a single layer, then transfer to a zip bag once solid; they keep well for up to 2 months. Thaw at room temperature for about an hour, then frost as usual. The buttercream can also be made up to 3 days ahead and stored in the fridge in a covered bowl — re-beat it for 1–2 minutes before using to bring it back to a spreadable consistency.
Funfetti Cupcakes
Ingredients
Cupcakes
- 1 ½ cups all-purpose flour sifted for a lighter texture
- 1 ¼ teaspoons baking powder
- ¼ teaspoon salt
- ½ cup unsalted butter room temperature
- 1 cup granulated sugar
- 2 large eggs at room temperature
- 2 teaspoons vanilla extract
- ½ cup whole milk room temperature
- â…“ cup rainbow sprinkles nonpareils for a pop of color
Frosting
- ½ cup unsalted butter softened
- 1 ¾ cups powdered sugar sifted
- 1 teaspoon vanilla extract
- 2 tablespoons whole milk or as needed for consistency
Instructions
- Preheat your oven to 180°C (350°F) and line a 12-cup muffin tin with cupcake liners.
- In a medium bowl, sift together the all-purpose flour, baking powder, and salt. Set aside.
- In a large bowl, beat the butter and granulated sugar together until light and fluffy, about 3-4 minutes. This incorporates air for a lighter texture.
- Add the eggs, one at a time, beating well after each addition. Stir in the vanilla extract.
- Gradually add the dry ingredients in thirds, alternating with the milk. Begin and end with the dry ingredients. Mix until just combined.
- Gently fold in the rainbow sprinkles, being careful not to overmix as this can cause the colors to bleed.
- Divide the batter evenly among the prepared cupcake liners, filling each about two-thirds full.
- Bake for 18-20 minutes, or until a toothpick inserted into the center of a cupcake comes out clean. Allow cupcakes to cool completely on a wire rack.
- To make the frosting, beat the softened butter on medium speed until creamy. Gradually add the powdered sugar, one cup at a time, beating on low speed.
- Add the vanilla extract and 1 tablespoon of milk, then increase the mixer speed to high and beat for 2-3 minutes until light and fluffy. Add more milk if needed until desired consistency is achieved.
- Frost the cooled cupcakes using a piping bag for a professional finish. Top with additional sprinkles for decoration.
Notes
Nutrition
FAQ
Can I use nonpareils (the tiny round sprinkles) instead of jimmies?
You can, but the colors will bleed more into the batter, giving the crumb a grayish or muddy tint rather than distinct pops of color. Jimmies — the longer, softer rod-shaped sprinkles — hold their color through baking much better and are the better choice for this recipe.
Can I make these as a cake instead of cupcakes?
Yes. This batter works in two 8-inch round pans; bake at 350°F for 22–26 minutes and check with a toothpick. The frosting quantity in the recipe card is sized for 12 cupcakes, so double it if you want to fill and frost a two-layer cake.
My cupcakes came out dense. What went wrong?
The most common cause is under-creaming the butter and sugar — 3 to 4 minutes is not an exaggeration. The second likely culprit is overmixing once the flour goes in, which develops gluten and tightens the crumb; stop as soon as the dry streaks disappear.
Can I substitute the whole milk with a non-dairy alternative?
Oat milk and full-fat soy milk both work well here and won’t noticeably change the texture or flavor. Avoid thin nut milks like almond milk, which have a lower fat content and can make the crumb slightly drier.
How do I get the cupcakes to all be the same size?
Use a cookie scoop or an ice cream scoop to portion the batter — a standard #16 scoop (about 3 tablespoons) fills a liner to two-thirds full in one pass. It’s faster and more consistent than spooning, and it’s a good task for kids to help with.
Can I add almond extract to the frosting?
Yes, and it works well. Start with just ¼ teaspoon alongside the vanilla — almond extract is strong and can easily overpower the buttercream if you add too much. Taste before adding more.
More sweet things to bake
- Nutty Brown Butter Vanilla Bean Cupcakes
- Nostalgic Malted Milk Chocolate Cake
- Gourmet Homemade Pop-Tarts
- Ultimate Chocolate Sheet Cake