Cinnamon Graham S'Mores Cupcakes

Ingredients

• 1/4C unsalted butter, softened
• 1/2C granulated sugar
• 1 egg
• 1 tsp vanilla extract
• 3/4 tsp cinnamon
• 1/4 tsp salt
• 1 tsp baking powder
• 3/4C all purpose flour
• 1/4C graham cracker crumbs
• 6 Tbsp milk
• 1 egg white
• 1/4C granulated sugar
• 1/8 tsp cream of tartar
• 1/4 tsp vanilla extract
• 4 Tbsp unsalted butter, softened
• 2 1/2C powdered sugar
• 1/4C cocoa powder
• 4 Tbsp milk