Prep your pan and oven: Heat the oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment, leaving overhang on two sides for easy lifting.
Toast the pecans: Spread pecans on a baking sheet and toast for 5–7 minutes, until fragrant.
Cool slightly, then chop. This step elevates the flavor.
Mix the wet ingredients: In a medium bowl, whisk maple syrup, coconut sugar, eggs, melted butter, applesauce, vanilla, and maple extract until smooth and glossy.
Combine the dry ingredients: In another bowl, whisk almond flour, oat flour, protein powder, baking powder, baking soda, salt, and cinnamon to break up any clumps.
Bring it together: Add the dry mixture to the wet. Stir with a spatula until just combined.
The batter will be thick but spreadable.
Fold in the goodies: Stir in most of the pecans (and chocolate chips if using), reserving a small handful to sprinkle on top.
Spread and top: Scrape the batter into the prepared pan and smooth the top. Sprinkle with the remaining pecans (and chips).
Bake: Bake for 18–22 minutes, until the edges are set and a toothpick comes out with a few moist crumbs. Don’t overbake—slightly underdone is ideal for blondies.
Cool and slice: Let cool in the pan for at least 20–30 minutes.
Lift out using the parchment, then slice into 12 squares.