Add the baking powder, baking soda, sea salt, and pumpkin spice to the blender.
Blend to combine and then remove the S-shape blade.
Add 1/4 cup chocolate chips. Fold into the batter.
Rub or spray the pan with coconut oil and line with parchment paper. Pour the batter into the baking dish and spread to even. Sprinkle with remaining chocolate chips.
Bake the blondies for 25-30 minutes, or until a toothpick inserted comes out clean.
Let cool for 10-15 minutes before cutting into squares.