brown sugar, firmly packed
Combine oats, sugar and butter, mixing until crumbly.
Place in a shallow baking pan.
Heat in preheated 350 oven about 10 minutes, stirring occasionally.
Cool 15 minutes, then toss lightly with a fork to form crumbs.
Store in covered jar in refrigerator.
Stir with fork before using.
Serve as a topping on sundaes, puddings and other desserts.