Double Chocolate Chip Muffins

Ingredients (13)

• 2 cups all-purpose flour
• 3/4 cup unsweetened cocoa powder
• 1/2 teaspoon salt
• 2 teaspoons baking powder
• 1 teaspoon baking soda
• 11/2 cups granulated sugar
• 2 eggs
• 1/2 cup salted butter, melted and cooled
• 1 teaspoon vanilla extract
• 11/2 cup buttermilk
• 1 cup sour cream
• 1 cup mini chocolate chips
• 1/2 cup semi-sweet chocolate chips