Preheat oven to 425 degrees.
Add self-rising flour and coconut oil to a mixing bowl, and use a pastry cutter or forks to cut the coconut oil into the flour until the mixture is like fine crumbs. Stir in the milk until mixture forms a soft dough and no longer sticks to the sides of the bowl. Knead the mixture until combined, but be careful not to over-knead.
Turn the dough out onto a cutting board that has been lightly dusted with flour. Gently roll the dough out until it reaches a 1/2-inch thickness. Use a biscuit cutter (or the top of a round cup) to cut out the biscuits, and transfer to a baking sheet.
Bake for 10 minutes, or until the biscuits have risen and ever so slightly begin to brown on top. Remove and serve immediately.
*To make 1 cup of self-rising flour, combine 1 cup of unbleached all-purpose flour, 1.5 tsp of baking powder, and 1/2 tsp of salt. Whisk all ingredients together until well blended.