In a large mixing bowl add 1 cup pumpkin purée, 2 eggs, 1 tsp vanilla, 5 tbsp melted butter, ⅓ cup maple syrup & ½ cup yogurt. Whisk to combine.
In a separate mixing bowl, add 2 cups of flour, ⅓ cup brown sugar, 1 tsp baking soda, ½ tsp baking powder, ½ tsp salt, 1 tsp pumpkin pie spice and 1 tsp cinnamon. Stir to combine and transfer to bowl of wet ingredients. Stir until flour streaks are just about gone.
Transfer batter on top of the sticky bun topping in the loaf pan evenly. Be mindful to distribute the batter carefully without mixing the topping. Bake at 350 F for 50-60 mins, until a toothpick inserted comes out with crumbs instead of wet batter.
Allow loaf to cool for about 5 minutes before carefully flipping upside down to be released from the pan (you may want to cut around the edges of the pan to loosen it). Scrape whatever topping is stuck to the bottom of the pan and arrange on top. Slice and enjoy, best enjoyed day of baking.