Prep: Preheat the oven to 350°F. Line 2 baking sheets with parchment paper.
Cream the butter: In the bowl of a stand mixer fitted with the paddle attachment, add the butter, cane sugar, and vanilla extract. Mix on low until combined and butter is light and fluffy, about 3 minutes.
226 grams salted butter, 170 grams cane sugar, 1 teaspoon vanilla extract
Make the dough: Add the sourdough discard and dry ingredients. Mix together until combined into a smooth dough, it will be a little crumbly.
57 grams sourdough discard, 383 grams all purpose flour, ½ teaspoon ground allspice, ¼ teaspoon ground cloves
Add the Turbinado sugar to a small bowl.
65 grams Turbinado sugar
Shape the dough: Using your hands, form the dough into 30 balls and roll in the turbinado sugar.
Place the dough on the prepared cookie sheets (15 per sheet, 3 x 5) and press your thumb into the center to create an indent. Fill with jam.
170 grams Homemade Cranberry Jam
Bake: Bake for 19 to 22 minutes, or until lightly browned on the bottom. Let cool completely on the cookie sheets.