Start by heating your oven to 350°F and having a 9x13 dish set aside. Then whisk the eggs, pumpkin, sugar, oil, and 1 tsp. vanilla extract together until combined and smooth. In a separate bowl, sift the flour, xanthan gum, baking powder, baking soda, salt, cinnamon, and nutmeg together. Then add the dry ingredients to the wet ingredients and stir until combined.