Step 1

Preheat oven to 350 and prepare an 8 inch square pan by lining it with foil or parchment paper.

Step 2

In a microwaveable bowl, melt butter and chocolate together in 20 second bursts, stirring in between, until completely melted and smooth.

Step 3

In a large bowl, combine butter and chocolate mixture with sugar and stir. Add eggs and stir. Add vanilla and salt. Stir.

Step 4

Add flour and stir until flour is just incorporated. Pour batter into prepared pan and smooth out.

Step 5

Bake approximately 20 minutes, or until a toothpick inserted in the middle comes out with moist crumbs, but not wet batter.

Step 6

Set pan on a rack to cool.