Chocolate Glazed Cupcakes

Ingredients

• Nonstick baking spray
• 1 cup plus 2 tablespoons lightly salted butter, room temperature
• 1 cup granulated sugar
• 1 cup light brown sugar
• 3 eggs
• 2 1/2 cups plus 2 tablespoons all-purpose flour
• 1 cup cocoa powder
• 2 teaspoons baking powder
• 1/4 teaspoon salt
• 1/4 teaspoon ground cinnamon
• 2 cups whole milk yogurt
• 8 ounces semisweet chocolate
• 3/4 cup sour cream
• 1 teaspoon vanilla extract
• 1 tablespoon cocoa powder
• 4 tablespoons light corn syrup