Preheat oven to 350 degrees farenheit. In an 8 inch pan, melt butter or salted unrefined coconut oil in the pan for 5 minutes, just prior to baking. In a large bowl, mix all dry ingredients in a large bowl, breaking up any clumps from the coconut flour.

Combine coconut milk and apple cider vinegar in measuring cup and let sit to form “buttermilk”. Stir in turmeric if using, and heat for 30 seconds in microwave to soften. Beat eggs in small bowl and add sugar. Combine with milk mixture.

Form a well in center of dry mix and stir in wet ingredients until just combined. Add in melted coconut oil.

Pour batter into pan. Bake for 30-35 minutes or until cooked through, and edges are light golden brown. Let cool before slicing into squares.