Rhubarb and Oat Crumble Bars with Lemon
Tart rhubarb compote baked under a crisp oat topping, brightened with fresh lemon zest. This american-inspired desserts (gluten-free) ready in about 60 minutes layers rhubarb, granulated sugar, cornstarch 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 220 calories and feeds 9, 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.
Ingredients
- 2 cups rhubarb
- 1/2 cup granulated sugar
- 2 tbsp cornstarch
- 1 tsp lemon zest
- 1 cup old-fashioned oats
- 1/2 cup all-purpose flour
- 6 tbsp unsalted butter
- 2 tbsp coconut oil
- 1/4 cup chopped almonds
Instructions
- Step 1: Preheat oven to 350°F (175°C). Line an 8x8-inch baking dish with parchment paper.
- Step 2: In a medium bowl, toss 2 cups chopped rhubarb with 1/2 cup sugar, 2 tbsp cornstarch, and 1 tsp lemon zest. Transfer to the prepared dish.
- Step 3: In another bowl, mix 1 cup old-fashioned oats, 1/2 cup flour, 6 tbsp melted butter, and 2 tbsp coconut oil until crumbly. Press half the mixture evenly over the rhubarb.
- Step 4: Sprinkle 1/4 cup chopped almonds and the remaining crumble mixture over the rhubarb.
- Step 5: Bake 35-40 minutes until the topping is golden and the rhubarb bubbles around the edges. Cool completely before cutting.
Frequently asked questions
How long does Rhubarb and Oat Crumble Bars with Lemon take to make?
Total time is about 60 minutes (20 min prep + 40 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 and Oat Crumble Bars with Lemon?
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 and Oat Crumble Bars with Lemon?
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 and Oat Crumble Bars with Lemon for a different number of people?
The recipe is written for 9 servings. Multiply each ingredient by (your serving target / 9). 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.
Is Rhubarb and Oat Crumble Bars with Lemon gluten-free?
Yes — this recipe is tagged gluten-free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★★
Loved it! Perfect for summer gatherings.
- ★★★★★
Lemon zest really brightens up the rhubarb. Oat crumble is just right - not too sweet.
- ★★★★★
These bars are a perfect balance of tart rhubarb and sweet lemon. My family devoured them!
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