Cinnamon-Oat Apple Crisp with Buttery Streusel

Why You’ll Love This Recipe

• Perfect balance of tart apples and warm cinnamon sweetness.
• Buttery oat streusel bakes up irresistibly crisp and golden.
• Easy, no-fuss dessert—no pie crust skills required.
• Make-ahead and freezer friendly for stress-free entertaining.

Grocery List

• Produce: 3 1/2 lb mixed apples (Granny Smith + Honeycrisp or Pink Lady), 1 lemon
• Dairy: Unsalted butter (12 tbsp), vanilla ice cream or heavy cream (optional)
• Pantry: Old-fashioned oats, all-purpose flour, light brown sugar, granulated sugar, cornstarch, cinnamon, nutmeg, kosher/fine salt, vanilla extract, pecans (optional)

Full Ingredients

Apple Layer

• 3 1/2 lb (1.6 kg) tart-sweet apples, peeled, cored, and sliced 1/4 in thick (about 10 cups)
• 2 tbsp (30 ml) lemon juice
• 1/3 cup (67 g) granulated sugar
• 2 tbsp (25 g) light brown sugar
• 3 tbsp (24 g) cornstarch
• 1 tsp ground cinnamon
• 1/4 tsp ground nutmeg
• 1/4 tsp fine sea salt
• 1 tsp vanilla extract

Buttery Cinnamon-Oat Streusel

• 1 cup (100 g) old-fashioned rolled oats
• 1 cup (125 g) all-purpose flour
• 3/4 cup (150 g) light brown sugar, packed
• 1 tsp ground cinnamon
• 1/4 tsp ground nutmeg
• 1/2 tsp kosher salt (or 1/4 tsp fine sea salt)
• 12 tbsp (170 g) cold unsalted butter, cut into 1/2 in cubes
• 1/2 cup (60 g) chopped pecans (optional)

To Serve (Optional)

• Vanilla ice cream, lightly sweetened whipped cream, or a drizzle of cold heavy cream

Step-by-Step Instructions

Step 1: Heat the oven and prep the dish

Position a rack in the center of the oven and preheat to 375°F (190°C). Lightly butter a 9×13-inch (3-quart) baking dish to prevent sticking and help the edges caramelize.

Step 2: Slice and season the apples

Peel, core, and slice the apples 1/4 inch thick so they cook evenly. In a large bowl, toss the slices with lemon juice, granulated sugar, brown sugar, cornstarch, cinnamon, nutmeg, salt, and vanilla until every slice is glossy and coated. Spread the apples evenly in the prepared dish, pressing down gently to level the surface.

Step 3: Make the oat streusel

In a separate bowl, combine oats, flour, brown sugar, cinnamon, nutmeg, and salt. Add the cold, cubed butter and cut it into the dry ingredients with a pastry cutter or your fingertips until the mixture forms moist, pea-to-walnut-sized clumps. Stir in pecans if using. The mixture should hold together when squeezed.

Step 4: Top the apples

Scatter the streusel evenly over the apples, squeezing some larger clumps for extra crunch. Leave a few small gaps so steam can escape and the topping bakes crisp.

Step 5: Bake until bubbly and golden

Bake for 45 to 50 minutes, until the topping is deep golden brown and the apple juices are bubbling thickly around the edges. If the top browns too quickly, tent loosely with foil for the last 10 minutes.

Step 6: Rest and serve

Cool the crisp on a rack for 15 minutes to let the juices thicken. Serve warm as-is, or add a scoop of vanilla ice cream, a dollop of whipped cream, or a drizzle of cold heavy cream.

Pro Tips

• Use a mix of apples (tart + sweet) for the best flavor and texture. Granny Smith with Honeycrisp or Pink Lady is a winning combo.
• Keep butter cold for a craggier, crunchier streusel. If it softens, chill the bowl 10 minutes before topping.
• Slice apples evenly (1/4 inch). Thinner slices can turn mushy; thicker slices may stay too firm.
• For extra crunch, bake on a preheated sheet pan to help set the bottom and catch any drips.
• Check doneness by piercing the center with a knife—the apples should be tender but not collapsing, and juices should be syrupy, not watery.

Variations

• Gluten-Free: Use certified GF oats and replace flour with a 1:1 gluten-free all-purpose blend.
• Maple-Pecan: Swap 1/4 cup (50 g) of the brown sugar in the streusel with 1/4 cup (60 ml) pure maple syrup; reduce butter to 10 tbsp (140 g).
• Apple-Cranberry: Fold 1 cup (100 g) fresh or frozen cranberries into the apple mixture and add 1 to 2 extra tablespoons sugar to balance tartness.

Storage & Make-Ahead

Refrigerate leftovers, covered, for up to 4 days. Reheat single servings in a 350°F (175°C) oven or air fryer for 8 to 12 minutes to re-crisp the topping (microwave softens it). To make ahead, assemble the apple layer and the streusel separately; refrigerate both up to 24 hours, then top and bake. Or assemble fully, cover tightly, and freeze up to 3 months; bake from frozen at 350°F (175°C) for 55 to 65 minutes, tenting with foil if needed.

Nutrition (per serving)

Approx. 450 calories; 20 g fat; 66 g carbohydrates; 5 g protein; 5 g fiber; 320 mg sodium; 38 g total sugars. Based on 8 servings and excludes optional ice cream and nuts.