Strawberry-Rhubarb Crisp Recipe
For the Topping:
5 ounces light brown sugar
3 3/4 ounces whole wheat flour
4 ounces old-fashioned rolled oats
1 1/2 teaspoons ground cinnamon
1 teaspoon whole anise seed
1 teaspoon Chinese five-spice powder
1/4 teaspoon Diamond Crystal kosher salt; for table salt, use half as much by volume or use the same weight
5 ounces unsalted butter
For the Filling:
2 pounds rhubarb, cut into 3/4-inch pieces
10 1/2 ounces sugar
2 1/2 ounces tapioca flour , such as Bob’s Red Mill
2 ounces elderflower liqueur or water
3/4 teaspoon Diamond Crystal kosher salt; for table salt, use half as much by volume or use the same weight
12 ounces trimmed strawberries , cut in half if large
1/4 teaspoon baking soda
To Serve :
1 recipe lemon or orange whipped cream
Combine brown sugar, whole wheat flour, rolled oats, cinnamon, anise seed , five-spice powder, salt, and butter in the bowl of a stand mixer fitted with a paddle attachment. Mix on low speed to form a thick dough, about 5 minutes. Alternatively, this can be done by hand. Transfer to a zip-top bag and refrigerate until needed, up to 1 month.
Adjust oven rack to lower-middle position and preheat to 400 degrees F . In the same bowl from the stand mixer , combine 22 ounces rhubarb with sugar, tapioca flour, elderflower liqueur or water, and salt. Toss with a flexible spatula and transfer to a 7- by 11-inch baking dish or 9-inch deep-dish pie pan, sprinkling any remaining sugar/starch on top. Cover with foil, place on a foil- or parchment-lined half-sheet pan, and bake until rhubarb is wilted and juicy, about 30 minutes. Meanwhile, transfer strawberries and remaining 10 ounces rhubarb to the same bowl.
Remove baking dish from oven, discard foil, and sprinkle with baking soda. Stir carefully with a heat-resistant spatula until juices begin to fizz. Pour over remaining fruit and fold to combine, then return to baking dish. Top with handfuls of prepared streusel, flattening each addition into a thin sheet to achieve even coverage. Continue baking until crisp is bubbling in the very center, about 35 minutes more. Cool at least 30 minutes before serving, as the filling will be dangerously hot and extremely runny at first. The crisp will thicken as it cools to room temperature. If you like, serve à la mode or with dollops of lemon or orange whipped cream. Wrapped in foil, the crisp will keep 3 days at room temperature.