Ingredients

  • 3/4 cups dark brown sugar
  • 3/4 cups rolled oats
  • 3/4 cups all-purpose flour
  • 1 teaspoon baking powder
  • 1/2 teaspoon freshly ground allspice
  • 1/2 teaspoon freshly grated nutmeg
  • 1/2 teaspoon kosher salt
  • 4 tablespoons unsalted butter (1/2 stick), at room temperature, plus extra for coating the slow cooker
  • 2 pounds ripe but firm peaches (about 5 medium peaches), halved, pitted, and cut into 1/2-inch-thick slices

Method

  • Completely coat the bottom and sides of the slow cooker with butter; set aside.
  • Place the brown sugar, oats, flour, baking powder, spices, and salt in a large bowl and whisk to combine.
  • Add the measured butter and toss with your fingers until well coated in the flour mixture.
  • Using a pastry blender or 2 knives, cut the butter into the dry ingredients until reduced to pea-size pieces and the mixture looks crumbly, about 2 to 3 minutes.
  • Add the peach slices and mix until well combined.
  • Add to the slow cooker, making sure the mixture is evenly spread out.
  • Cook on low until the peaches are tender and the crumble mixture is brown, about 3 hours.
  • Scoop into serving bowls, along with whipped cream or vanilla ice cream if so desired.