The Ultimate Berry Crumble

Details

Ingredients

• 2 cups all-purpose flour
• ¼ teaspoon fine salt
• ¾ teaspoon baking powder
• ¾ cup white sugar
• ¾ cup frozen unsalted butter
• 1 ½ teaspoons vanilla extract
• 2 large egg yolks
• 1 teaspoon apple cider vinegar, or as needed
• 1 cup blueberries
• 1 cup raspberries
• 1 cup blackberries
• 1 teaspoon lemon zest
• 2 teaspoons fresh lemon juice
• ⅓ cup white sugar
• 2 teaspoons cornstarch
• 1 pinch cayenne pepper