Lemon-Blueberry Crumble

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

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Warm blueberries baked under a buttery oat crumble, brightened with lemon zest for a perfect dessert. This American-inspired recipe, ready in about 60 minutes, layers blueberries, granulated sugar, lemon juice 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 280 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.

Prep: 20 min Cook: 40 min Serves 6 American cuisine 280 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 375°F (190°C). In a medium bowl, toss 4 cups fresh blueberries, 1/4 cup granulated sugar, 1 tbsp lemon juice, and 1 tsp cornstarch until evenly coated. Transfer to a 9x9-inch baking dish.
  2. Step 2: In a separate bowl, combine 1/2 cup all-purpose flour, 1/2 cup rolled oats, 1/4 cup packed brown sugar, 1/2 tsp ground cinnamon, and 1/4 tsp salt. Add 1/4 cup cold unsalted butter cubes and mix with a fork until crumbly.
  3. Step 3: Sprinkle crumble mixture evenly over blueberry filling and press gently to form a cohesive layer.
  4. Step 4: Bake for 35-40 minutes until filling bubbles around edges and topping is golden brown.
  5. Step 5: Let cool for 15 minutes, then sprinkle 1 tbsp lemon zest over top before serving.

Frequently asked questions

How long does Lemon-Blueberry Crumble 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 Lemon-Blueberry Crumble?

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 Lemon-Blueberry Crumble?

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 Lemon-Blueberry Crumble 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 Lemon-Blueberry Crumble?

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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