Okay so you know how sometimes grown-ups like to create yummy things with fruit that you can enjoy for dessert? Well, one of those yummy things is called an apple crumble.
First, they take some apples and cut them up into small pieces. Then they mix those apple pieces with some sugar and spices like cinnamon until they're all covered and taste really good.
Next, they take some flour, oats, and butter and mix them all together until it looks like a big pile of sand. This is what they call the crumble topping.
After that, they pour the apple mixture into a baking dish and sprinkle the crumble topping on top. Then, they pop it in the oven to bake for a little while until it gets crispy on top and the apples are nice and soft.
Finally, they take it out of the oven and let it cool down for a little while before serving it with some whipped cream or ice cream on top.
And that is how you make an apple crumble!