Dunkaroo Cake - Food By The Gram

Ingredients

• 1 cup all purpose flour
• 1/2 c sugar
• 1/2 tbsp baking powder
• 1/4 tsp salt
• 3 tbsp canola oil
• 1 egg
• 1/2 cup milk (can sub non-dairy milk)
• 1 tsp vanilla extract
• 1/4 cup rainbow sprinkles
• 1/2 cup nilla wafers (crushed (Teddy Grahams work great too))
• 1/2 tsp cinnamon
• 1 tsp dark brown sugar
• 6 tbsp unsalted butter (softened to room temperature)
• 2.5 cups powdered sugar
• 1/4 tbsp milk (up to 1 tbsp - add as needed to reach desired consistency)
• 1/2 tsp vanilla extract
• 1/4 cup Cool Whip whipped topping