Heat oven to 350 degrees F. Line an 8 x 8 baking pan with aluminum foil leaving excess foil hang over two opposing sides for easy removal. Grease and flour bottom and sides of the foil; set aside.
In medium bowl, melt butter in microwave on HIGH at 30 second intervals, stir and repeat if necessary until fully melted.
Whisk in sugar and cocoa. Beat in eggs and vanilla.
Using a rubber spatula, fold in flour until flour is completely blended in cocoa.
Pour evenly into pan. Bake for 35 to 40 minutes or until toothpick inserted in center comes out clean. ENJOY!
