Pre-heat your oven to 350°F. Line an 8x8 inch square pan with parchment paper, leaving extra length up the sides of the pan to use as handles. (This will yield bars just over ¾ inch thick. For slightly thinner bars, use a 9x9 inch pan).
In a large bowl, combine all of the dry ingredients and mix until combined.
In a separate bowl, whisk together the wet ingredients until smooth.
Pour the wet ingredients over the dry ingredients and mix until well combined.
Pack the mixture as tightly as you can into your pan.
Bake for 25-30 minutes until the top is golden and the edges are light brown.
Allow the bars to cool to about room temperature, and then transfer to the fridge to cool completely before cutting.