Preheat the Oven: Start by preheating your oven to 350°F (175°C). This step is crucial for ensuring an even bake.
Mix Ingredients: In a large bowl, combine pumpkin puree, sugar, and milk. Whisk until thoroughly mixed.
Add Dry Ingredients: In another bowl, mix the flour, baking powder, and pumpkin pie spice. Gradually add this to the wet mixture, stirring gently until just combined.
Incorporate Butter and Pecans: Stir in the melted butter and chopped pecans, making sure everything is evenly distributed.
Prepare the Baking Dish: Pour the batter into a greased baking dish (9×9 inches works great!). Spread the batter evenly.
Bake: Place the dish in the preheated oven and bake for 40-45 minutes, or until a toothpick inserted in the center comes out clean.
Cool and Serve: Let it cool for about 15 minutes before serving warm. For an extra treat, top with whipped cream or a scoop of ice cream!