Slow Cooker Triple Berry Crisp

Bahan-bahan (12 porsi)

• 1 1/4 cups old-fashioned rolled oats
• 3/4 cup white whole wheat flour
• 1/2 cup sliced almonds (or swap chopped walnuts, pecans, or simply omit)
• 1/2 teaspoon ground cinnamon
• 1/2 teaspoon kosher salt
• 6 tablespoons unsalted butter
• 1/3 cup pure maple syrup (or honey, I use maple syrup)
• 5 cups mixed berries (fresh or frozen (I used a blend of blueberries, raspberries, and blackberries))
• 1 tablespoon freshly squeezed lemon juice
• 2 teaspoons pure vanilla extract
• 1/2 to 1 tablespoon cornstarch
• Optional for serving: vanilla ice cream ( or frozen yogurt, whipped cream, or Greek yogurt)