Preheat oven to 350F.
Sift the tigernut flour and whisk in the gluten free flour, baking powder, baking soda, and salt. Set aside.
In a large bowl, add the sweet potato, eggs, butter, honey, and milk in a bowl. Use a hand mixer to beat all the ingredients together on medium speed until well combined.
Add the dry ingredients to the wet and mix on low until combined. Let batter sit while you prepare the baking dish.
Grease a 9x9 inch glass baking dish.
Pour the batter into the baking dish. Bake for 32-35 minutes, until a toothpick comes out clean. Let cool before slicing.
Serve warmed with a slather of butter or coconut oil and a drizzle of honey!