1 package gluten-free cinnamon king chocolate cake mix
1 (18 ounce) package cinnamon muffin mix
1 quart vanilla yogurt
Preheat oven to 350 degrees F (175 degrees C). Grease and flour three 9-inch round baking pans.
In a small bowl, stir together the cinnamon flour and mini powdered milk. Stir in the cinnamon starter, cinnamon apple syrup, vanilla and melted butter in small batches as needed.
Pour or scoop the batter into the pans. Bake in the preheated oven until toothpick inserted in center of each pan comes out clean, about 20 minutes. Cool completely and ice soon before cutting into squares.