Spice Cake – 2 3/4 cups (350g) all purpose flour – 1 1/2 tsp baking powder – 1 tsp baking soda – 1/2 tsp salt – 1 tbsp cinnamon – 1 tsp cardamom – 1 tsp ginger – 1/2 tsp nutmeg – 1/4 tsp clove – 2 cups (380g) light brown sugar, packed – 1 cup (200ml) vegetable or canola oil – 1 cup (235g) unsweetened apple sauce – 4 large eggs, room temperature – 3 tsp vanilla extract – 3/4 cup (200g) sour cream, room temperature Brown Butter Cream Cheese Frosting – 1 cup (220g) unsalted butter – 16 oz cream cheese, room temperature – 5 cups (600g) powdered sugar – 1/2 tsp vanilla extract