Preheat the oven to 350 °F.
Whisk eggs in a small bowl. Add butter and cream.
3 whole eggs, 1/4 cup butter, 1/2 cup sour cream
In a second bowl, mix all dry ingredients together. Reserve the nuts to be either blended into the batter or sprinkled on top.
1/4 cup ground flax meal, 1/4 cup coconut flour, 1/4 cup almond flour, 1/2 cup Keto brown sugar substitute, 1 tablespoon ground cinnamon, 1 teaspoon baking powder, 1 teaspoon vanilla extract, 1 teaspoon star anise seed, 1/2 teaspoon salt, 1/4 teaspoon allspice powder
Combine the dry ingredients with the egg mixture. If desired, blend the nuts in now. Pour batter into greased 8 by 8-inch glass baking dish. If the nuts are not blended in to the dough, sprinkle them on top now.
1/2 cup macadamia nuts
Bake for 30 minutes. Test the center with a knife. If it is ready, remove from the oven and let cool. Serve warm, room temperature or cold.