Measure 2 cups of flour mixture, 4 tsp of baking power, 1/2 tsp of salt, and 1/4 cup flax meal into food processor and pulse to mix. Add 1 stick of cold butter, sliced, and pulse until fully cut in. Pour flour mixture into mixing bowl and stir in 1 1/4 cups cold milk. Let stand for 8-10 minutes. Drop dough onto parchment-lined baking sheet and bake at 350°F for 20-25 minutes until lightly golden around the edges and firm.