Apple Crumble Coffee Cake
Ingredients: 2 teaspoons unsalted butter 2 cups all-purpose flour ½ teaspoon fine sea salt 1 teaspoon baking powder ¾ teaspoon baking soda 1 ½ cups finely chopped toasted walnuts ⅓ cup packed light brown sugar ⅓ cup white sugar ¼ teaspoon salt 1 teaspoon ground cinnamon 3 tablespoons unsalted butter, melted ½ cup unsalted butter, at... » read more