Rhubarb-Orange Crumble with Oat Crust

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Tart rhubarb and citrus compote topped with a buttery oat crumble, baked to golden perfection for a comforting dessert. This american-inspired desserts ready in about 65 minutes layers chopped into 1/2-inch pieces rhubarb, zested and juiced orange, granulated sugar into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 260 calories and feeds 6, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

★ 4.3 (13 ratings) Prep: 20 min Cook: 45 min Serves 6 American cuisine 260 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F (190°C). Toss rhubarb, orange zest, orange juice, granulated sugar, and flour in a 9x13-inch baking dish until combined.
  2. Step 2: In a separate bowl, mix rolled oats, brown sugar, cinnamon, and cold cubed butter until crumbly and pea-sized. Sprinkle evenly over rhubarb mixture.
  3. Step 3: Bake for 40-45 minutes until rhubarb is bubbling around the edges and topping is golden brown. Let rest 15 minutes before serving to thicken.
  4. Step 4: Serve warm with vanilla ice cream or whipped cream if desired.

Frequently asked questions

How long does Rhubarb-Orange Crumble with Oat Crust take to make?

Total time is about 65 minutes (20 min prep + 45 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.

How do I store leftover Rhubarb-Orange Crumble with Oat Crust?

Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.

Can I substitute ingredients in Rhubarb-Orange Crumble with Oat Crust?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Rhubarb-Orange Crumble with Oat Crust for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Rhubarb-Orange Crumble with Oat Crust?

American desserts like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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