How do you keep streusel topping crunchy?

Chef's answer
Just bake longer with more turns for more crisp.
Frequently asked Questions 🎓
Crumbles and crisps are very similar, with the name crumble originating from England. They both contain fresh fruit with a streusel-like topping that gets baked until the fruit is cooked. The original difference between the two lay in the streusel topping: crisps would contain oats and crumbles would not.
Just bake longer with more turns for more crisp.
A deep-dish fruit dessert topped with a streusel made of butter, flour, oats, and sometimes nuts. A crumble but with NO OATS in the streusel.
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