These yellow birthday cupcakes are adapted from my original recipe. In this improved version, use sour cream, cake flour, and extra vanilla to guarantee each cupcake is soft, buttery, and extra moist. Decorate with chocolate buttercream and plenty of sprinkles!
- 1 and 3/4 cups (207g) cake flour (spoon & leveled)
- 2 teaspoons baking powder
- 1/4 teaspoon salt
- 1/2 cup (1 stick; 115g) unsalted butter, softened to room temperature
- 1 cup (200g) granulated sugar
- 2 large eggs, at room temperature
- 1/3 cup (80g) sour cream, at room temperature
- 2 and 1/2 teaspoons pure vanilla extract
- 3/4 cup (180ml) whole milk, at room temperature
- frosting: chocolate buttercream and sprinkles for garnish, or any of these frostings
- Preheat the oven to 350°F (177°C). Line a 12-cup muffin pan with cupcake liners. Line a second pan with 2 liners – this recipe makes about 14 cupcakes. Set aside.
- Whisk the cake flour, baking powder, and salt together. Set aside.
- Using a handheld or stand mixer fitted with a paddle attachment, beat the butter and sugar together on high speed until smooth and creamy, about 2 minutes. Scrape down the sides and up the bottom of the bowl with a rubber spatula as needed. Add the eggs and vanilla extract. Beat on medium-high speed until combined, then beat in the sour cream. Scrape down the sides and up the bottom of the bowl as needed. With the mixer on low speed, add the dry ingredients until just incorporated. With the mixer still running on low, slowly pour in the milk until combined. Do not over-mix. The batter will be slightly thick.
- Pour/spoon the batter into the liners. Fill only 2/3 full to avoid spilling over the sides. Bake for 19-22 minutes, or until a toothpick inserted in the center comes out clean. For around 30 mini cupcakes, bake for about 11-13 minutes, same oven temperature. Allow the cupcakes to cool completely before frosting.
- Frost cooled cupcakes with chocolate buttercream. I used Ateco 849 piping tip. Top with sprinkles, if desired.
- Leftover cupcakes keep well covered tightly in the refrigerator for 3 days.
- Make Ahead & Freezing Instructions: Cupcakes can be made ahead 1 day in advance, covered, and stored at room temperature. Frosting can also be made 1 day in advance, covered, and stored in the refrigerator until ready to use. Freeze frosted or unfrosted cupcakes for up to 2-3 months. Thaw overnight in the refrigerator.
- Cake Flour: If you can’t get your hands on cake flour, you can make this cake flour substitute. I suggest doing this twice, mixing it all up in 1 bowl then removing 1/4 cup since you need 1 and 3/4 cups in this recipe.
- Whole Milk & Sour Cream: Whole milk and sour cream are strongly recommended for the best taste and texture. A full fat plain yogurt would work instead, though the cupcakes may not be as light. Same goes with a lower fat milk.
- Why is everything at room temperature? All refrigerated items should be at room temperature so the batter mixes together easily and evenly. Read here for more information.
- Yellow Cake: I suggest following my yellow sheet cake recipe or my layered yellow cake recipe. I also have a vanilla cake recipe as well.
- Chocolate Buttercream: I use and recommend my chocolate buttercream recipe. The room temperature butter for the pictured frosting was super soft, so I added a little extra cocoa powder. As a result, the color and flavor were a little deeper! Avoid over-whipping the chocolate buttercream as that will lighten the texture and color.
- Special Tools: KitchenAid Stand Mixer, Cupcake Pan, Cupcake Liners, Piping Tip, Piping Bags
- Be sure to check out my 10 tips for baking the BEST cupcakes before you begin!
Keywords: birthday, chocolate frosting, sprinkles