Apple Cider Breakfast Doughnuts

Name: Apple Cider Breakfast Doughnuts
Prep time: 45 min
Cook time: 21 min
Total time: 1 h 6 min
Cuisine: American
Ingredients: 2 1/4 cups apple cider; 2 cups (240g) whole wheat flour; 2 tsp ground cinnamon; 1/2 tsp ground nutmeg; 1/2 tsp ground allspice; 1 tsp baking powder; 1/2 tsp baking soda; 1/4 tsp salt; 1 large egg; 1/3 cup (60g) light brown sugar, packed; 3/4 cup (190g) mashed butternut squash; 2 tbsp (22g) canola oil; 1/4 cup (55g) unsweetened oat milk (or milk of choice); 1 tsp vanilla extract; 1 1/2 tbsp (21g) unsalted butter, melted; 1/4 cup (50g) granulated sugar; 1 tsp ground cinnamon