Place oats, butter, flour, brown sugar, granulated sugar, salt and cinnamon in a bowl.
Use a pastry cutter or your hands to combine the ingredients. No dry or sandy spots should remain.
Sprinkle the crumble topping evenly over your favorite fruit crisp or pie.
Bake according to the recipe instructions. The topping is baked through when it’s lightly browned and crunchy.
For more recipes, check out More Than Meat and Potatoes!