Chocolate Peanut Butter Cupcakes with Tagalongs

Ingredients

• 3/4 cup plus 2 Tbsp. cocoa powder
• 1/2 cup boiling water
• 1 cup buttermilk
• 1 3/4 cups flour
• 1 1/4 tsp. baking soda
• 1/4 tsp. baking powder
• 1/4 tsp. salt
• 3/4 cup butter (room temperature )
• 1 1/2 cups sugar
• 2 large eggs (room temperature)
• 1 tsp. vanilla extract
• 1 cup creamy peanut butter
• 3 Tbsp. butter (room temperature )
• 2/3 cup confectioner's sugar
• 1 cup heavy cream
• 8 oz. semi-sweet chocolate (chopped or chips )
• 1/2 cup butter (room temperature)
• 4 cups confectioner's sugar
• 2 tsp. vanilla
• 3 – 4 Tbsp. heavy cream or milk
• Tagalongs (crushed for sprinkling on top )