A prepared serving of oat-topped mixed berry crumble
Source: boise.coop

Summary

  • Makes 8 servings.
  • About 45 minutes, excluding stated chilling or freezing time.
  • Let the crumble rest 15 minutes so the fruit filling thickens.

Recipe at a glance

This original oat-topped mixed berry crumble recipe makes 8 servings and takes about 45 minutes, excluding any overnight chilling or freezing stated in the method. It is designed for a US home kitchen and uses familiar grocery-store ingredients. The format emphasizes plant foods, whole grains, lean protein or unsaturated fats where they fit the dish, consistent with broad American Heart Association and USDA MyPlate eating-pattern guidance. [1] [2]

Ingredients

Measure the following before starting: 1) 5 cups mixed berries; 2) 1 cup rolled oats; 3) 1/2 cup whole-wheat flour; 4) 1/3 cup chopped walnuts; 5) 1/4 cup maple syrup; 6) 2 tablespoons canola oil; 7) 1 tablespoon cornstarch; 8) 1 teaspoon cinnamon. Ingredient brands vary, especially for sodium and added sugar, so compare labels when buying canned foods, sauces, yogurt, nut butter, broth and packaged whole-grain products. Unless the ingredient list says otherwise, drain and rinse canned beans and use unsweetened dairy or nondairy products. [1] [2]

How to make it

1) Heat the oven to 375°F. 2) Toss berries with cornstarch and half the maple syrup in a baking dish. Work with clean hands, utensils and preparation surfaces, and keep cold ingredients refrigerated until needed. [1] [2]

3) Mix oats, flour, walnuts, oil, cinnamon and remaining syrup and scatter over fruit. 4) Bake 30 to 35 minutes until bubbling. Taste at the end and adjust with herbs, citrus or black pepper before considering additional salt. Serve in the stated portions while the intended hot or cold texture is at its best. [1] [2]

Healthy preparation and storage

Let the crumble rest 15 minutes so the fruit filling thickens. The word “healthy” describes the overall ingredient pattern and preparation method, not a medical treatment or a promise that one recipe fits every dietary need. People managing allergies, diabetes, kidney disease, celiac disease or another condition should adjust ingredients with guidance appropriate to them. [1] [2]

Refrigerate leftovers in shallow covered containers within two hours. Most cooked recipes keep for three to four days; fresh assembled salads, cut avocado dishes and crisp snacks are best sooner. Reheat cooked leftovers until steaming, and do not leave dairy, eggs, seafood, poultry or meat at room temperature for extended periods. [2]

Reporting sources

  1. American Heart Association · The American Heart Association Diet and Lifestyle Recommendations ↗Accessed October 18, 2026
  2. USDA MyPlate · MyPlate Kitchen recipes and healthy meal guidance ↗Accessed October 18, 2026

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