(Gluten-free, dairy-free)
Place the butter or coconut oil into a 3L baking pan and allow the butter/oil to melt in the oven.
Mix the flour, sugar and milk together slowly to avoid any clumping. Pour this over the melted butter slowly and do NOT stir together. The mixture will look pretty soupy - don't be alarmed!
To make this gluten-free:
For the 1 1/2 cups of self-raising flour, substitute 1 cup rice flour, 5 tbs potato starch, 3 tbs tapioca starch, 3/4 tsp xanthan gum and 2 tsp baking powder