Preheat oven to 350 degrees. Grease two 6 inch cake pans and line bottoms with parchment paper and grease paper.
Sift cocoas, flour, baking soda, baking powder, salt, cinnamon and sugar into bowl. Beat in oil,buttermilk, vanilla, eggs, and hot water, one at a time, using a mixer set at low. Beat untilsmooth, about 2 minutes.
Pour 1 cup of batter into each 6 inch cake pan. Bake 30-32 minutes, or until toothpick comesout clean. Rotate pans halfway through and remove cakes from the oven.
Let cakes cool in pans on wire racks for 20 minutes before inverting to remove. Discard parchment paper. Cool on racks, top side up. Wash, dry and then prepare pans with grease nd parchment paper and cook another set of 6 inch cakes. Once cooled, stack with parchment between cakes and refrigerate for an hour or overnight.
Grease and add parchment paper to a large sheet pan and pour in the remaining batter. Bake at 350 for about 25-28 minutes or when a toothpick comes out clean. Allow to cool in sheet pan completely on wire rack.
Once cooled use a knife to run around the edge of the sheet pan. Using the 4 1/4 inch round cookie cutter, cut out 5-6 circles of cake. Repeat with the 3 inch cookie cutter. Remove cake rounds and stack between parchment paper and refrigerate for an hour or overnight.