In a small bowl, mix the flour, oats, brown sugar, cinnamon, and nutmeg. Add the butter, and using a fork or pastry blender, mash the butter into the dry ingredients until it's incorporated throughout.
2 Tbsp all purpose flour, 3 Tbsp old fashioned oats, 3 Tbsp light brown sugar, ½ tsp ground cinnamon, pinch of nutmeg, 2 Tbsp salted butter