Preheat the oven to 350 degrees F and line a 8” x 8” square baking pan with parchment paper.: When the oven warms, you should notice a faint dry heat and the smell of warming elements, that tells you it is ready. Lining the pan with parchment paper prevents sticking and helps you lift the slab out for clean slicing, which is especially useful with almond flour based batters that can be fragile. Press the parchment so it extends over two sides for easy removal. A common mistake is skipping the parchment, which can cause the blondies to break when you try to remove them, so take the extra minute to line the pan carefully.
Add the melted butter (or coconut oil), pumpkin puree, egg, and vanilla extract to a mixing bowl and mix well until completely combined.: As you stir these wet ingredients you will feel the mixture become smooth and glossy, and the aroma of warm fat and vanilla will lift. The texture should be homogenous with no streaks of oil, which means the egg and fat have emulsified with the pumpkin. Use a spatula or whisk, folding gently rather than beating vigorously. If you notice a separated sheen of oil after mixing, the fat was likely too hot and cooked the egg, so start over with cooled fat to avoid a grainy batter.
Add the dry ingredients to the mixing bowl (almond flour, maple sugar, pumpkin pie spice, baking soda, and sea salt) and stir well until a thick dough forms.: When the dry ingredients are incorporated, the batter will thicken and take on a cohesive, slightly tacky feel, indicating the almond flour has hydrated. Stir slowly to avoid overworking the mixture, which can make the texture dense. The aroma of spices will bloom as the dry and wet combine, and you should not see pockets of loosened sugar. If the batter seems too wet, check your measuring; almond flour varies, and you may need a touch more to reach the right consistency, but add sparingly to avoid dryness.
Stir in the chocolate chips until well distributed throughout the dough.: As you fold in the chocolate chips , aim for an even scatter so every square gets pockets of chocolate. The batter’s color will speckle with chip pieces, and you can press a few extra chips on top for a glossy finish. Gentle folding helps keep the dough from deflating or becoming overworked. If you find many chips sink to the bottom during mixing, chill the batter briefly for firmer structure before transferring to the pan.
Transfer the blondie dough to the prepared pan and smooth into an even layer. If desired, top with more chocolate chips.: Use a spatula to spread the dough into an even layer, watching the surface go from rough to smooth and slightly glossy. Tapping the pan on the counter once can help settle the dough and remove air holes, creating uniform thickness, which is crucial for even baking. If you top with extra chips they will melt slightly and create an attractive studded surface. Avoid pressing too hard as this can compact the mixture and produce a denser final texture.
Bake on the center rack of the preheated oven for 20 to 25 minutes, until the edges are lightly golden-brown and the center is still somewhat soft.: As the blondies bake, you will notice the edges firming and taking on a gentle golden tone, while the center remains a touch jiggly. This contrast signals the ideal bake for a moist interior. The oven will emit a warm, spicy aroma from the pumpkin pie spice as it caramelizes sugars. A common error is overbaking until the center is dry, so aim to remove them when a toothpick comes out with a few moist crumbs rather than clean.
Remove the cookie bars from the oven and allow them to cool for at least 30 minutes. Transfer the pumpkin blondies to a cutting board. Cut them into squares, and enjoy!: Cooling is when the blondies set, the residual heat finishing the bake and helping them firm enough to slice cleanly. You will notice the surface settle slightly and the scent will mellow into a rich, nutty perfume. Use the parchment to lift the slab out, then slice with a sharp knife for neat squares. Cutting too early risks a gooey mess, so patience pays off with tidy bars and cleaner portions.