Instructions

For the Cake

1. Preheat your oven to 350 degrees F. Spray or butter three 6-inch round cake pans, place parchment rounds in each pan and spray or butter the parchment as well. Set aside.
2. In a small bowl, stir together 1/2 cup brown sugar and 1 teaspoon ground cinnamon. Set aside.
3. In a large bowl, mix together flour, baking powder and cinnamon. Set aside.
4. In the bowl of a stand mixer, fitted with the paddle attachment, beat the butter and granulated sugar on medium speed until light and fluffy, about 2 minutes.
5. Add eggs, one at a time, beating well and scraping down the sides of the bowl after each addition. Add vanilla.
6. With the mixer on medium-low speed, add the flour and milk alternately, starting and ending with the flour mixture and scraping the bowl as needed. Pour 7 oz. of the batter in each pan. Divide the cinnamon and brown sugar mixture between the three cakes (about 1 oz.), sprinkling evenly over the batter, then top with the remaining batter (7 oz. more per pan)..
7. Bake for 35-40 minutes or until a toothpick inserted in the center of the cake comes out clean or with just a few crumbs. Remember, not all ovens are the same, so check your cakes around 20 minutes and keep an eye on them.
8. Remove cakes from the oven and let cool in pans for about 10 minutes before inverting onto a wire rack to cool completely.
9. Once cooled completely, wrap each cake layer with plastic wrap and chill for at least 30 minutes. This makes leveling and frosting a bit easier.

For the Frosting

1. In the bowl of your mixer, beat the butter until light and fluffy, about 2 minutes. 
2. With the mixer on low speed, gradually add the powdered sugar. When it's all combined, turn the mixer to medium-high and gradually add the heavy cream. Continue to beat until the frosting is light and fluffy and white in color. Add the vanilla and cinnamon and mix until combined.

For the Cinnamon Chip Ganache

1. Place the cinnamon chips and cream in a microwave safe bowl. Heat in the microwave in 15 second intervals, stirring in between, until the mixture is smooth. Let cool to room temperature using on the cake.

Assembly

1. After leveling the cake layers (if needed), place one cake layer, top-side up, and cover with frosting and create a little rim of frosting around the edge of the cake layer. Spread a little cinnamon chip ganache on the frosting before placing another cake layer on top. Cover the second cake layer with more frosting and cinnamon chip ganache.. Place the final cake layer, top-side down, and coat the entire cake with a crumb coat.
2. Chill the crumb coat for about 10 minutes before finishing the frosting and adding the drip.