In the same bowl, mix together your oats, cassava flour, tapioca starch, coconut sugar, baking powder, salt, melted butter and vanilla. Stir until crumbly.
1 cup oats, 2 tbsp tapioca flour/starch, ¼ cup cassava or other grain free flour like almond, ½ cup coconut sugar, 1 tsp baking powder, Pinch of salt, ½ cup melted butter, 1 tsp vanilla extract, ½ cup pecans