Prep: Preheat the oven to 400°F.
Make the batter: In a large mixing bowl, add the melted butter, light brown sugar, sourdough discard, and egg. Mix using a hand mixer until combined.
86 grams salted butter, 170 grams light brown sugar, 113 grams sourdough discard, 1 large egg
Add in the yogurt, milk, flour, baking powder, cinnamon, salt, ginger, all spice, cardamom, cloves, and black pepper in that order. Mix on low until a stiff dough forms. Transfer to a piping bag with no tip.
57 grams plain Greek yogurt, 56 grams milk, 255 grams all purpose flour, 2 teaspoons baking powder, 1 teaspoon ground cinnamon, ½ teaspoon fine sea salt, ½ teaspoon ground ginger, ½ teaspoon ground allspice, ¼ teaspoon ground cardamom, ¼ teaspoon ground cloves, ¼ teaspoon black pepper
Make the topping: In a medium bowl, add the melted butter, flour, cane sugar, light brown sugar, and cinnamon. Mix together with a spatula until a paste texture forms.
85 grams salted butter, 95 grams all purpose flour, 57 grams cane sugar, 57 grams light brown sugar, 1 teaspoon ground cinnamon
Lightly grease two donut pans with olive oil cooking spray to prevent sticking. Pipe the donut batter into the pans, this makes 10 donuts.
Crumble the topping on top of the donuts.
Bake: Bake for 10 to 14 minutes or until a toothpick inserted in the center come out clean the topping looks golden brown. Allow the donuts to cool completely in the pans.
Make the glaze: In a small bowl, add the powdered sugar and mix. Whisk together until a smooth glaze forms.
142 grams powdered sugar, 28 grams milk
Transfer the donuts to a wire rack. Spoon or drizzle the glaze on top.
Enjoy and Store: Serve fresh with a cup of coffee. Store leftovers in an airtight container for up to 3 days.