This 5-ingredient oven spring crisp is my go-to when those pretty pinkish-green stalks (yep, rhubarb!) start showing up at the store and I’m short on time. Instead of fussing with stovetop cooking, you literally toss the raw chopped rhubarb right in the baking pan with a few pantry staples, slide it into the oven, and let it transform into a bubbly, sweet-tart crisp. It’s the kind of simple dessert that feels special enough for company but easy enough for a Tuesday night, and in my house it disappears fast—my husband always asks if there’s more hiding in the fridge.
Serve this warm rhubarb crisp straight from the oven with a scoop of vanilla ice cream, a dollop of whipped cream, or a spoonful of vanilla yogurt if you want to keep it a bit lighter. It’s lovely alongside a cup of coffee or hot tea after dinner, and the leftovers are surprisingly great for breakfast with Greek yogurt and a sprinkle of nuts. If you’re hosting, pair it with a simple roast chicken or sheet-pan dinner so everything can bake at once and you’re not juggling a million dishes.
5-Ingredient Spring Rhubarb Oven CrispServings: 6
Ingredients
6 cups raw rhubarb stalks, chopped into 1/2-inch pieces (pinkish-green, fibrous stalks only)
3/4 cup granulated sugar
1/2 cup all-purpose flour, divided
1/2 cup old-fashioned rolled oats
6 tablespoons unsalted butter, melted
Directions
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch metal baking pan or similar metal baking sheet with a little butter or nonstick spray if you like, just to help with cleanup.
Rinse the rhubarb stalks under cool water and pat dry. Trim off and discard any leaves (they are not edible) and any dried ends. Chop the pinkish-green fibrous stalks into 1/2-inch pieces until you have about 6 cups.
Scatter the raw chopped rhubarb evenly over the bottom of the metal baking pan. This should look like a full, colorful layer of pieces covering the whole pan.
In a medium bowl, stir together the granulated sugar and 1/4 cup of the all-purpose flour until well combined. Sprinkle this sugar-flour mixture evenly over the rhubarb in the pan, tossing lightly with your hands or a spatula right in the pan so the raw chopped stalks are lightly coated. Spread back into an even layer.
In the same bowl (no need to wash it), combine the remaining 1/4 cup all-purpose flour and the rolled oats. Pour in the melted butter and stir with a fork until the mixture forms moist, clumpy crumbs.
Sprinkle the oat-butter crumb mixture evenly over the top of the rhubarb layer, covering as much surface as you can. Don’t worry if a little rhubarb peeks through.
Place the pan on the middle rack of your preheated oven. Bake for 30–40 minutes, until the rhubarb is bubbling around the edges and the topping is golden brown and crisp. If your oven runs hot, start checking at 25 minutes.
Remove the pan from the oven and let the crisp cool for at least 10–15 minutes so the juices can thicken slightly. Serve warm, scooped straight from the pan, and watch how quickly everyone comes back for seconds.
Variations & Tips
For a slightly less tart dessert, you can increase the sugar to 1 cup or mix in 1–2 chopped sweet apples or a handful of strawberries with the rhubarb before baking. If you prefer a nuttier topping, stir 1/4 cup chopped pecans or almonds into the oat mixture before adding the melted butter. To make this a bit more whole-grain, swap half of the all-purpose flour for whole wheat flour. For a dairy-free version, use melted coconut oil or a neutral vegetable oil in place of butter, keeping in mind the flavor will change slightly. If you like warm spices, a teaspoon of ground cinnamon or a pinch of nutmeg can be mixed into the sugar-flour coating or the oat topping. Food safety tips: Only use the rhubarb stalks—never the leaves, as they are toxic and should be discarded immediately. Wash the stalks well to remove any dirt, and always use a clean cutting board and knife. Bake until the crisp is bubbling all the way through; this ensures the rhubarb is fully cooked and the flour in the filling has thickened the juices properly. Store any leftovers covered in the refrigerator for up to 3 days and reheat portions in the oven or microwave until hot before serving.
