Double Chocolate Chip Muffins | Food Stuff

Ingredients

• 2 teaspoons baking powder
• 1/2 cup butter, room temperature
• 2 eggs
• 3/4 cup milk
• 1/2 teaspoon salt
• 1/3 cup sour cream (not non-fat) or yogurt
• 1 cup sugar
• 2/3 cup unsweetened cocoa powder
• 2 teaspoons vanilla extract
• 2 cups white whole wheat flour or all-purpose flour