1/4cupmilk or half and half, added 1 tablespoon at a time
Instructions
Preheat oven to 375 degrees.
Cream the butter and sugar in a large bowl. Add the eggs and yolk one at a time, beating well after each addition. Add vanilla, sour cream and buttermilk, beat until all wet ingredients are incorporated. Add dry ingredients all at once, beat until batter is smooth, about 1 minute.
Scoop batter into cupcake liners. Fill about 3/4 of the way full. Bake at 350 for 15-18 minutes or until cake springs back when touched lightly in the middle.
For the Frosting:
Place butter, peanut butter and vanilla in a large bowl, mix well. Add salt, powdered sugar and milk or half and half and beat until smooth.
Notes
-To ensure proper rising of your cake, make sure the normally cold ingredients (butter, eggs, sour cream, buttermilk) are at room temperature.
-I like to use an ice cream scoop or large cookie scoop to place the batter into the cupcake liners.
-This recipe yields about 18 cupcakes. The frosting will cover the 18 cupcakes. I swirled the frosting onto the cupcake with a butter knife. If you like to pipe the frosting, or like a lot of frosting on the cupcakes, double this frosting recipe.
-If you are piping the frosting on, don't add too much milk or half and half. Add the liquid a tablespoon at a time.