First Step: Gather and Prep Ingredients Begin by preheating your oven to 350°F and lining a cupcake pan with 13 liners. Measure out all ingredients, making sure butter, egg whites, and milk are at room temperature for even mixing. This step sets the foundation, as room temperature items blend better and lead to lighter cupcakes.

Second Step: Mix the Dry Ingredients In a bowl, whisk together 1 ½ cups cake flour, 2 teaspoons baking powder, and ½ teaspoon salt until combined. This ensures the leavening agents are evenly distributed, which helps the cupcakes rise properly. For those with dietary preferences, you can swap in gluten-free flour here to keep things adaptable.

Third Step: Cream the Butter and Sugar In another bowl, cream ½ cup unsalted butter and 1 cup granulated sugar until the mixture is light and fluffy, which usually takes about 2-3 minutes. Add 1 ½ teaspoons vanilla extract and beat until incorporated for extra flavor. This step is crucial for creating air pockets that make the cupcakes tender.

Fourth Step: Add Egg Whites and Liquids Beat in 3 large egg whites until the mixture is light and fluffy, about 1 minute. Then, alternately add the flour mixture in thirds and ½ cup whole milk in halves, starting and ending with the flour. Mix just until incorporated to avoid tough cupcakes, and consider using low-fat milk for a lighter version.

Fifth Step: Bake the Cupcakes Divide the batter evenly among the 13 cupcake liners, filling each about ⅔ full. Bake for 15-18 minutes, or until the center springs back when pressed. Check for doneness early if you’re at a higher altitude to prevent overbaking, which can dry out the cupcakes for diet-conscious bakers.

Sixth Step: Prepare the Frosting Once the cupcakes cool completely on a wire rack, make the frosting by beating 1 cup unsalted butter until creamy. Gradually add 4 cups confectioner’s sugar on low speed, then increase to high and whip for 2-3 minutes. Add ⅓ cup very cold heavy cream, 2 teaspoons vanilla extract, and ⅛ teaspoon salt, then whip for another 2-3 minutes until fluffy. If you prefer a dairy-free option, use a non-dairy cream alternative.

Final Step: Frost and Serve Pipe or spread the frosting onto the cooled cupcakes and serve immediately for the best taste. This recipe yields 13 servings, with prep time at 20 minutes, cook time at 18 minutes, and cooling at 15 minutes, totaling 53 minutes. These treats store well and can be part of your meal prep for parties or quick snacks.