Karen's Fall Apple Cake with Streusel and Caramelized Apples - A Zest for Life

Ingredients

• 1 ½ cups flour (or gluten-free flour blend)
• ½ teaspoon baking soda
• ½ teaspoon baking powder
• 1 teaspoon cinnamon
• ¼ teaspoon grated nutmeg
• ½ teaspoon sea salt
• 1 stick unsalted butter ((8 ounces; organic))
• ½ cup pure cane sugar
• ¼ cup coconut palm sugar (or brown sugar)
• 2 large eggs (room temperature)
• ½ teaspoon vanilla
• ½ cup buttermilk ((organic))
• 2 large Mcintosh apples (or macoun, peeled and 1/3" dice)
• 6 tablespoons unsalted butter (melted (organic))
• ⅓ cup coconut palm sugar
• 1 pinch sea salt
• ¾ cup flour (or gluten-free flour mix)
• 1 pinch cinnamon
• 3 tablespoons regular oats