Ingredients
Equipment
Method
Prep and preheat
- Preheat oven to 350°F, then grease a 9x13 pan.
- Whisk together all-purpose flour, baking powder, baking soda, 2 teaspoons cinnamon, cream of tartar, nutmeg, and salt until evenly combined.
Mix batter
- Whisk melted and slightly cooled unsalted butter with 1-1/2 cups granulated sugar until glossy and smooth.
- Whisk in pumpkin puree that has been blotted dry, then whisk in eggs and vanilla extract until the batter looks uniform.
- Fold the flour mixture into the wet ingredients just until combined, then spread the batter into the prepared pan.
Top and bake
- Mix the cinnamon sugar topping ingredients (3 tablespoons granulated sugar, 2 teaspoons cinnamon, and cream of tartar) and sprinkle generously over the entire surface.
- Bake for 25 to 30 minutes at 350°F until the bars are just set; do not overbake so the center stays chewy.
Cool and cut
- Cool the bars completely before cutting, so the cinnamon sugar crust and chewy interior set cleanly.
Notes
Pro tip: blot the pumpkin puree well so the bars bake with a soft, chewy interior instead of turning cakey or gummy. Store covered at room temperature up to 2 days or refrigerate up to 5 days; freeze up to 2 months (thaw overnight in the fridge). For a lower-sugar swap, replace 1:1 with a baking-style sugar substitute designed to caramelize in the oven, keeping the cinnamon-sugar topping proportion the same.
