1. Preheat oven to 350 degrees F, and prepare (3) 6" cake pans with nonstick spray. 
2. In a large bowl, mix the dry ingredients together until everything is combined.  Add in the wet ingredients and mix on low speed unit combined.  Mix for an additional 3-5 minutes on high speed. 
3. Distribute batter evenly between the three pans and bake for 30-35 minutes or until a toothpick inserted into the center of the cake comes out clean.
4. Once cakes are done, allow them to cool in the pan for about 5 minutes, then remove from pan and place the cakes on a wire rack to cool completely. 

Frosting

1. In a small saucepan. combine peanut butter and honey. Warm over low heat and stir until melted, smooth and creamy. Pour into the bowl of a stand mixer and add in the remaining ingredients and beat until smooth and fluffy. 

To assemble

1. Start by placing one level layer on a cake board or stand. Top with about 1/2 cup of peanut butter frosting and level. Continue with each layer. 
2. Once you have added all layers, cover the outside of the cake in the frosting and smooth. Add chocolate shavings to the top if you wish and enjoy!