Having a freezer full of crisp or crumble topping is like a dessert secret weapon. It allows you turn any fresh fruit (or hey, even thawed frozen fruit) into an after-dinner treat without dirtying more than one bowl. Our traditional crisp and crumble toppings freeze incredibly well, but since you never know when a gluten-free guest might drop by, I highly suggest keeping both on hand. (Just label them clearly!)
This crisp topping doesn't have any special flours in it and can be made entirely from pantry staples that you're likely to have on hand. It bakes up toasty with a delightful chew, and you can easily adapt it to a more crumble-like texture without much more effort. Here's everything you need to know about making a gluten-free crisp that you can memorize and know by heart.
Essentials of Gluten-Free Fruit Crisp Toppings
Crisps, crumbles, and cobblers have a reputation for being infallible. However, diving into the world of gluten-free baking, it's best to arm ourselves with knowledge so that we can feed ourselves and our gluten-free friends well. Here's what you'll need to know for making the best gluten-free crisp topping.
- The ingredients for a gluten-free crisp topping.
- The golden ratio for fruit to topping.
- How to turn crisp topping into a dessert secret weapon.
I promised that this gluten-free crisp would be pantry-friendly, and it is, but here's what you need to know. Just because oats are naturally gluten-free doesn't mean that every package of oats is gluten-free. Oats are often processed (rolled, weighed, packaged) in facilities that process wheat or other gluten-rich products. Several manufacturers now process their oats and other gluten-free flours and starches on separate machinery to prevent cross contamination — and those are the oats we need to keep this crisp gluten-free.
Look for gluten-free labeling on rolled oats and then you can turn those oats into oat flour for this crisp topping. You can also buy oat flour and skip the at-home oat processing all together.
Read more: Why Are Some Oats Labeled Gluten-Free?
The Golden Ratio
You'll need one batch — three cups — of this crisp topping for about two pounds of fruit. Crisp topping is amenable to more or less fruit, so you have creative license to use as little or as much as you want.
How to make this a gluten-free crumble topping
Crisps and crumbles are close cousins, with crisps being defined by their inclusion of whole oats. For a more crumble-like topping texture, process all of the oats into a fine flour and proceed with the same butter, sugar, and salt ratio.
How to Use Gluten-Free Crisp Topping
Let's say you've got a batch of this crisp topping whipped up and a bunch of fresh fruit you want to use up. Here's how to bring the two together.
- Slice the fruit into bite-sized pieces; this makes scooping and eating so much easier.
- Then toss the fruit with a little cornstarch, lemon juice, and sugar.
- Spread the fruit into a baking dish and top with the crisp topping. You'll want roughly one cup of crisp topping for every 12 ounces of fruit.
Freezing Gluten-Free Crisp Topping for the Future
Here's your secret weapon: Take one rainy afternoon in June and mix up three to four batches of crisp topping. Freeze each unbaked batch in a large zip-top bag and lay the bags flat in the freezer. You can then divvy out as little or as much topping as you need at a time. There's no need to thaw the crisp topping before baking either.
How To Make the Best Gluten-Free Crisp Topping
What You Need
For the fruit filling:
Butter, for coating the baking dish
2 pounds fresh fruit, peeled and chopped as desired
1/2 cup granulated sugar
2 tablespoons cornstarch
For the topping:
2 cups gluten-free rolled oats, divided
3/4 cup packed light brown sugar
1/2 teaspoon fine salt
8 tablespoons (1 stick) unsalted butter, melted and cooled
9x9-inch or 11x7-inch glass baking dish
Coffee grinder, blender, or food processor
Gallon-size zip-top freezer bag (optional)
- Heat the oven. Arrange a rack in the middle of the the oven and heat to 350°F. Coat 9x9-inch or 11x7-inch glass baking dish with butter; set aside.
- Make the fruit filling. Whisk together the sugar and cornstarch in a medium bowl until lump-free, and then add the fruit and lemon juice. Toss gently to coat, then pour the fruit filling into the baking dish.
- Make oat flour. Process 1 cup of the oats in a coffee grinder, blender, or food processor fitted with the blade attachment until it resembles flour, about 3 minutes. Transfer to a large bowl.
- Make the crisp topping. Add the remaining 1 cup oats, sugar, and salt and stir until combined. Drizzle the butter and vanilla over the oat mixture and stir to combine. Set aside or store in the freezer in a zip-top freezer bag.
- Add crisp topping. Scatter the crisp topping evenly over the fruit mixture, leaving large clumps intact.
- Bake the crisp. Bake until the fruit juices are bubbling around the edges of the baking dish and the topping is golden and firm to the touch, 30 to 35 minutes.
- Cool and store the crisp. Let the crisp cool for at least 15 minutes before serving. If transporting to a picnic or party, let the crisp cool completely to give the fruit filling time to set.
- Make ahead: The crisp topping can be frozen for up to 3 months.
- Storage: Crisps will keep, covered and refrigerated, for up to 1 week. Serve cold, room temperature, or re-warmed in a low oven for 20 minutes.