Preheat the oven to 350f. Line the cake pan with parchment paper and spray extra virgin olive oil or avocado oilIn a bowl add 1 1/2 cup all purpose einkorn flour, 1 1/2 tsp. baking powder, 1/4 tsp. baking soda, 1/3 cup Dutch processed cocoa, 1/2 tsp. pink himalayan salt. 1 1/2 cup all purpose einkorn flourIn another bowl, add in 3 egg whites. Whisk together about 1 minute until the egg whites turn foamy.Add in the 3/4 cup organic cane sugar and whisk another 30 seconds. Add in 1/4 cup butter melted, 1/2 cup Greek yogurt, 1/4 cup whole milk, 1 1/2 tsp vanilla bean paste, 1/4 cup brewed hot coffee. . Whisk together about 1 minute until combined.Slowly add the dry mixture into the wet mixture. Add it in 1/3's until combined- but do not over beat.Pour into the prepared cake pan. Bake 25-30 minutes until a toothpick comes out of the center clean. Start checking 5 minutes early because oven temperature vary.