Preheat your oven to 200℃/400℉.
Line a 12 muffin tin with either muffin papers, or spray tin with oil.
Whisk the dry ingredients together first.
2¼ cups gluten-free plain/all purpose flour, 2 tsp baking powder, 1 tsp baking soda (bi-carb soda), ½ cup white sugar
Make a well in your bowl and add the wet ingredients, mixing until combined, but not expecting a super smooth consistency.
2 eggs, 1 cup buttermilk, ¼ cup butter (melted), 4 tbsp vegetable oil, 1 tbsp vanilla extract
Add in most of the chocolate chips (holding some back for topping) and mix through.
1½ cups chocolate chips
Divide your muffin batter into 12 equal muffins and then top with the remaining choc chips.
Bake in the hot oven for 5 minutes, then reduce the heat to 180C/360F and continue to bake for 14 minutes. The muffins are ready when a skewer inserted into the muffin comes out clean, but don't get it confused with melted choc-chips!
Take the muffins out of the tin immediately, and place onto a cooling rack.