Chocolate Mayonnaise Cupcakes | Food Stuff

Ingredients

• 1 1/4 cups plus 2 tablespoons all purpose flour (6.1 oz)
• 1/8 teaspoon baking powder
• 3/8 teaspoon baking soda
• 1 ounce bittersweet chocolate, chopped
• 8 tablespoons butter, softened
• 1/2 cup (packed) dark brown sugar
• 1 large egg, room temp
• 1/2 cup granulated sugar
• 2/3 cups regular mayonnaise (mine was room temp)
• 3 cups sifted powdered sugar
• 1/3 cup room temperature sour cream
• 1/3 cup unsweetened cocoa powder (I used natural)
• 2/3 cup cocoa powder, unsweetened (used natural)
• 1 teaspoon vanilla
• 1/2 teaspoon vanilla extract
• 3/4 cup plus 2 tablespoons boiling water