INGREDIENTS
1
white cake mix
2
eggs
1 cup
sour cream
1/2 cup
milk
1/3 cup
vegetable oil
1 tsp
lemon zest
Strawberries for garnish
Blueberries for garnish
1 cup
butter ((2 sticks, softened))
3 cups
powdered sugar (, sifted)
1/2 tsp
salt
2 tsp
vanilla extract
Up to 4 Tablespoons milk or heavy cream
1/4 tsp
lemon zest ((optional))