Preheat oven to 325 degrees.
Coat silicone molds with 1 tablespoon melted butter. I use a silicone brush to paint it on. Set aside.
In a large bowl, add almond flour, coconut flour, erythritol, cinnamon and salt. Mix well.
Add remaining 6 tablespoons melted butter and combine well.
In a small bowl, add egg, vanilla and liquid stevia. Beat together.
Add egg mixture to almond flour mixture. Using a spatula, fold well.
Evenly add dough to molds, filling almost to the top. Leaving a small amount of room for expansion.
Bake for 15-20 minutes, depending on the size of your molds.