Rye Chocolate Crumb Cake - Oryana

Ingredients

• 1/3 cup cane sugar
• ¼ cup all-purpose flour
• ¼ cup rye flour
• 3 tablespoons cacao nibs
• 2 tablespoons unsweetened cocoa powder
• ¼ teaspoon kosher salt
• ¼ cup chilled unsalted butter, cut into pieces
• 1 teaspoon cinnamon
• 3/4 cup all-purpose flour (or use all rye)
• 3/4 cup rye flour
• ½ cup unsweetened cocoa powder
• 1 teaspoon baking powder
• ¾ teaspoon baking soda
• ¾ teaspoon salt
• ¾ cup (1½ sticks) unsalted butter, room temperature
• ½ cup cane sugar
• 1/3 cup (packed) light brown sugar
• 2 large eggs
• 1 teaspoon vanilla extract
• 3/4 cup buttermilk or kefir
• ¼ cup cooked squash or applesauce