Store in an airtight container, at room temp for a couple days or refrigerated for a few weeks; any method is fine to reheat, or eat at cold/room temp.
Ingredients
- 1 stick (8 tbsp) butter
- 1 cup brown sugar
- 1 egg
- 1 tsp vanilla extract
- 1/4 tsp salt
- 1 cup flour
Instructions
- Preheat the oven to 350 F (180 C)
- Line an 8x8 metal baking pan with parchment paper
- Brown the butter
- Whisk the (warm) butter into the brown sugar, and then let cool to room temp
- Add the egg, vanilla extract, and salt, and whisk until smooth
- Add 1/2 cup flour, and fold in (don’t whisk!) just until mixed
- Add the second 1/2 cup flour, and fold in only until fully mixed
- Spread the batter in the pan (it will be thick)
- Bake 20-30 minutes, just until the sides are set
- Let rest, the center will finish while it cools