Spiced Pear Upside Down Cake

Name: Spiced Pear Upside Down Cake
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American
Ingredients: 1/3 c. Maple Sugar (or Rapadura, Sucanat, Brown Sugar, Etc.); 3 tbsp. Salted Butter, Melted; 2 Ripe Pears, Peeled, Cored, And Sliced; 6 tbsp. Salted Butter, Softened; 3/4 c. Maple Sugar Or Sweetener Of Choice; 2 Large Eggs, Separated; 2 tbsp. Pure Vanilla Extract; 1 c. Plus 2 Tablespoons Whole Wheat Pastry Flour; 1 1/2 tsp. Baking Powder; 1/2 tsp. Salt; 1 tsp. Ground Cinnamon; 1/2 tsp. Ground Ginger; 1/4 tsp. Freshly Grated Nutmeg; 1/8 tsp. Ground Cloves; 1/4 c. Whole Milk; 1/4 tsp. Cream Of Tartar; Whipped Cream, Ice Cream, Or Vanilla Custard For Serving (optional)