Step 1

Preheat oven to 350 degrees. Line an 8x8 baking dish with parchment.

Step 2

Add the butter and brown sugar to a medium mixing bowl and stir to combine.

Step 3

Stir in the egg and vanilla.

Step 4

Stir in the flour and salt until well combined.

Step 5

Spread into the prepared pan. Combine sugar and cinnamon and sprinkle over the batter.

Step 6

Bake for 22 minutes or until a tester comes out mostly clean.

Step 7

Cool before cutting.