Slow Cooker Donut Bread Pudding

Name: Slow Cooker Donut Bread Pudding
Prep time: 10 min
Cook time: 8 h
Yield: 8
Ingredients: 6-8 cake donuts (not the raised kind)*; 5 cups milk; 4 eggs; 3/4 cup sugar; 1/2 tsp nutmeg; ⅛ tsp mace