An easy apple crumble recipe using oats is apple crisp from the Betty Crocker website calling for apples, flour, oats, butter and brown sugar. Layer the apples in a pan, mix the other ingredients together in a bowl, season with cinnamon and nutmeg, and sprinkle over the apples before cooking.
Another easy apple crumble recipe calls for mixing 14 ounces of peeled, cored and cut cooking apples with 2 ounces of sugar and 1 tablespoon of water in a saucepan. Cook on low for just five minutes until softened. After transferring the apples to a baking dish, mix 1 1/4 ounces of rolled oats, 1 1/4 ounces of flour and 3/4 ounces of sugar in a bowl. Cut in 1 1/4 ounces of cubed butter, and sprinkle the crumble mixture over the apples. Bake at 375 degrees Fahrenheit for 20 minutes.
Make old-fashioned apple crisp by combining in a baking dish 5 pounds of cored, peeled and cut apples with the zest and 2 tablespoons of juice from 1 lemon and 1 orange, 1/2 cup of granulated sugar, 2 teaspoons of ground cinnamon and 1 teaspoon of ground nutmeg. In a separate bowl, mix together 1 1/2 cups of flour, 3/4 cups of granulated sugar, 3/4 cup of light brown sugar, 1 cup of oatmeal and 1/2 teaspoon of kosher salt. Add in 1/2 pound of cold unsalted butter until the mixture forms a crumble, then sprinkle over the apples. Bake at 350 degrees Fahrenheit for one hour.