Step 1

Preheat oven to 350 degrees F and line an 8x8 baking pan with parchment paper.

Step 2

Place peeled bananas in a mixing bowl and thoroughly mash with a fork. Add the tahini, milk, vanilla, vinegar, and sugar. Whisk until combined.

Step 3

In a separate bowl whisk together the oat flour, baking powder and soda, and salt. Pour dry ingredients into the banana mixture, and stir to combine. Fold in the chocolate chips and most of the walnuts, reserving a palmful of nuts for the top.

Step 4

Transfer batter to the prepared pan, and sprinkle the top with chocolate chunks and reserved walnuts. Bake for 23 to 27 minutes or until the center appears set and gives only slightly when pressed.

Step 5

Allow to rest in the pan for 15 minutes, then lift out by parchment paper onto a cooling rack. Let the blondies cool for at least 20 to 30 minutes before cutting into squares.