INGREDIENTS
1
box white or yellow cake mix
3
eggs
1/3 cup
oil
1 cup
milk or buttermilk
1/2 cup
sour cream or plain yogurt
1 tbsp
vanilla extract
1 cup
mini M&M's
1/2 cup
smooth peanut butter
1/2 cup
butter, softened
2 tsp
vanilla extract
3 cups
powdered sugar
2 tbsp
milk