3lbsapplesabout 6-7 medium; use a mix of Granny Smith and Honeycrisp, peeled, cored, and sliced ¼ inch thick
¼cupgranulated sugar
2tbspbrown sugarpacked
1½tspground cinnamon
¼tspground nutmeg
1tbsplemon juicefreshly squeezed
1tbspcornstarch
1tsppure vanilla extract
Buttery Oat Streusel Topping
1½cupsold-fashioned rolled oatsnot quick oats
¾cupall-purpose flour
¾cupbrown sugarpacked
½tspground cinnamon
¼tspfine sea salt
½cupunsalted butter1 stick (8 tbsp), very cold, cut into small cubes
Instructions
Prep the Oven and Pan
Preheat your oven to 350°F (175°C). Lightly butter a 9×13-inch baking dish (or a similar 3-quart baking dish) and set aside.
Make the Apple Filling
Peel, core, and slice all your apples into ¼-inch thick slices. Add them to a large mixing bowl.
Sprinkle the granulated sugar, brown sugar, cinnamon, nutmeg, cornstarch, lemon juice, and vanilla extract over the apples. Toss everything together until the apples are evenly coated. Pour the apple mixture into the prepared baking dish and spread into an even layer.
Make the Oat Streusel Topping
In a separate large bowl, whisk together the rolled oats, flour, brown sugar, cinnamon, and salt until combined.
Add the cold butter cubes to the oat mixture. Using your fingertips, work the butter into the dry ingredients by pinching and pressing until the mixture resembles coarse, clumpy crumbs — some pea-sized chunks of butter are perfect. Do not overwork; you want distinct crumbles, not a paste. If the mixture starts to feel warm, refrigerate it for 10 minutes before continuing.
Assemble and Bake
Sprinkle the streusel topping evenly over the apple filling in the baking dish, covering the apples completely.
Bake on the center rack for 40–45 minutes, until the topping is a deep golden brown and the apple filling is bubbling around the edges. If the top is browning too quickly, loosely tent with foil for the last 10 minutes.
Remove from the oven and let the apple crisp rest for 10 minutes before serving. This allows the filling to set slightly so it isn't too loose when scooped.
Serve
Serve warm, scooped into bowls and topped with a generous scoop of vanilla ice cream or a dollop of freshly whipped cream. A drizzle of caramel sauce over the top is highly encouraged.
Notes
Storage: Cover and store at room temperature for up to 2 days, or refrigerate for up to 5 days. Reheat individual servings in the microwave for 60-90 seconds, or the whole dish in a 325°F oven for 15-20 minutes.Make-Ahead: Assemble completely, cover, and refrigerate unbaked for up to 24 hours. Bake straight from the fridge, adding 5-10 extra minutes.Freezer-Friendly: Freeze the fully baked (and cooled) crisp tightly wrapped for up to 3 months. Thaw overnight in the refrigerator and reheat in a 325°F oven until warmed through and the topping is re-crisped.Variations: Stir 1 tbsp of bourbon into the apple filling for a smoky depth. Add ½ cup of fresh cranberries or dried cherries to the filling for tartness. Swap ¼ cup of oats for finely chopped pecans or walnuts for extra crunch in the topping.