Brown Butter Salted Toffee Blondies

Brown the butter; In a small saucepan set over low-medium heat, melt butter and then continue to cook until it turns a copper/brown and smells wonderful and nutty. Make sure you are continuing to stir while it's cooking down. It will melt, and then foam before it browns. Keep an eye on it because it will go from brown to burned fairly quickly. Once done, place in a bowl and into the fridge to cool and thicken up a bit.
Preheat oven to 350 F. Line and spray and 8x8 baking dish with parchement paper.
Once butter has solidified again, add both sugars and mix on medium-high speed until combined. Don't be alarmed, it will have a gritty texture from the browned butter.
Add eggs one at a time, mixing between each. Add vanilla and mix.
Mix in dry ingredients until just combined, and then stir in the toffee bit by hand.
Pour batter into the prepared pan and bake for 30-35 minutes, or until a toothpick comes out clean.Sprinkle with flaked salt after pulling out of the oven. Cool completely before cutting for a perfect square.