1. Preheat the oven to 177°C (350°F). Line a 20 cm (8-inch) square pan with foil. Lightly oil the foil, add 15 ml (1 tablespoon) of the flour, and move the pan around, tapping the sides to coat the inside bottom and edges of the pan with flour.
2. In a large mixing bowl, stir together remaining 94 grams (3/4 cup) flour and the pea protein powder, baking powder, and salt.
3. In a food processor, blend the beans with the oil and hot water until completely smooth. Add the sugars and vanilla and pulse until smooth. Pour the wet mixture into the dry ingredients and with a rubber spatula fold together until slightly moistened, then add half of the chocolate chips and mix until just combined. The batter will be very thick, and that’s okay. Don’t overmix!
4. Scoop the batter into the prepared baking pan and use the rubber spatula to evenly spread the batter to the edges of the pan. Sprinkle the top with the remaining chocolate chips and the nuts. Bake for 20 minutes and let cool completely, then remove the blondies by picking up the edges of the foil. Slice into sixteen squares, store loosely covered, and eat them all or share them within about 2 days.