1 box white cake mix
1 cup sour cream
1/2 cup milk
1/3 cup vegetable oil
1 teaspoon lemon zest
Strawberries for garnish
Blueberries for garnish
1 cup butter (2 sticks), softened
3 to 4 cups powdered sugar, sifted
1/2 teaspoon salt
2 teaspoons vanilla extract
Up to 4 tablespoons milk or heavy cream
1. Combine all ingredients until incorporated. Scrape sides of bowl and then beat on med-high speed for 3 minutes.
2.Divide batter equally in half between two bowls.
3.Use red food coloring to color one bowl of batter to desired color of red. Wilton brand gel colors have the brightest color and are good to use here.
4.To make flag striped cupcakes alternately place a spoonful of red batter and then a spoonful of white batter in the cupcake holder. The batter is thick, so it won't spread on its own. A great tip is to set out a little bowl of water where you're working. Dip your finger in the water and then gently spread the batter out. The water will make it so the batter doesn't stick to your fingers.
5.Bake cupcakes according to the cake mix package directions.