Cast Iron Skillet Apple Crisp (Warm, Buttery Oat Topping)

Intro

Few desserts say fall like a cast iron skillet apple crisp. Tart-sweet apples bubble away under a golden, buttery oat streusel, and because it all happens in one skillet, the apples caramelize in their own juices while the topping stays shatteringly crisp. Start the filling on the stovetop, shower it with streusel, and let the oven finish the job — then serve it warm, straight from the skillet, with vanilla ice cream melting over the top.

Prep time: 20 minutes | Cook time: 40 minutes | Total: 1 hour | Servings: 8

Why You’ll Love This Cast Iron Skillet Apple Crisp

• One skillet, zero fuss — the filling starts on the stovetop in the same pan it bakes in
• Crisp topping, jammy apples — a quick stovetop pre-cook means the apples are perfectly tender by the time the streusel turns golden
• Made for a crowd — easily serves 8, and it doubles as a holiday dessert that practically serves itself
• Rustic presentation — bring the whole skillet to the table; it looks as good as it tastes

Ingredients

For the apple filling

• 3 lbs apples (about 8–9 medium), a mix of Honeycrisp and Granny Smith
• ⅓ cup granulated sugar
• 2 tablespoons all-purpose flour
• 1 teaspoon ground cinnamon
• ¼ teaspoon ground nutmeg
• 1 tablespoon fresh lemon juice
• Pinch of kosher salt
• 2 tablespoons unsalted butter

For the oat streusel topping

• 1 cup old-fashioned rolled oats (not instant)
• ¾ cup all-purpose flour
• ⅔ cup packed light brown sugar
• 1 teaspoon ground cinnamon
• ½ teaspoon kosher salt
• ½ cup (1 stick) cold unsalted butter, cut into small cubes

Instructions

1. Heat the oven. Position a rack in the center and preheat to 375°F (190°C).
2. Prep the apples. Peel, core and slice the apples about ¼-inch thick. Toss in a large bowl with the granulated sugar, flour, cinnamon, nutmeg, lemon juice and salt until evenly coated.
3. Start the filling on the stovetop. Melt the 2 tablespoons of butter in a 10- or 12-inch cast iron skillet over medium heat. Add the apple mixture and cook, stirring occasionally, for 5–7 minutes — just until the apples begin to soften and their juices thicken slightly. Remove from the heat.
4. Make the streusel. While the apples cook, combine the oats, flour, brown sugar, cinnamon and salt in a bowl. Add the cold cubed butter and work it in with your fingertips or a pastry cutter until the mixture forms clumpy, pea-sized crumbs. Don’t overwork it — craggy bits bake up crispest.
5. Assemble and bake. Spread the streusel evenly over the apples in the skillet, leaving the texture rough and craggy. Bake 30–35 minutes, until the topping is deep golden brown and the juices are bubbling thickly around the edges.
6. Rest and serve. Let the crisp rest for at least 15 minutes — the filling sets as it cools and will be molten straight from the oven. Serve warm, ideally with vanilla ice cream or softly whipped cream.

Tips for the Best Cast Iron Skillet Apple Crisp

• Mix your apples. All-Honeycrisp is one-dimensionally sweet; all-Granny Smith can be aggressively tart. A roughly half-and-half mix gives you sweetness, acidity and apples that hold their shape differently for better texture.
• Don’t skip the stovetop step. Starting the filling on the burner jumpstarts the apples so they’re fully tender by the time the topping browns. Without it, you risk a perfect streusel over crunchy, underdone fruit.
• Keep the butter cold. Room-temperature butter melts into the dry ingredients and bakes up sandy. Cold butter in distinct lumps creates the crisp, craggy clusters that make a great streusel.
• Watch the edges, not the clock. Ovens vary — the crisp is done when the topping is deeply golden and you can see thick bubbles at the skillet’s edge. Pale topping means underbaked.

What You’ll Need

A well-seasoned 10- or 12-inch cast iron skillet goes from stovetop to oven without missing a beat, and its heat retention keeps the crisp warm at the table long after it leaves the oven. If you’re cooking on a skillet that’s seen better days, browse our tested cast iron skillet picks to find one worth handing down.

Storing & Reheating

Cover leftovers and refrigerate for up to 4 days. Reheat individual portions in a 350°F oven for 10–12 minutes to re-crisp the topping — the microwave works in a pinch but softens the streusel. This crisp also freezes well: cool completely, wrap tightly, and freeze for up to 3 months.