Preheat oven to 350

Put microwave into bowl and cook on high for three minutes or until bubbles.

Stir in baking bars until melted.

Stir in eggs until incorporated.

Stir in vanilla extract.

Add flour, baking soda and salt. Stir well.

Pour into prepared baking pan.

Cook for 15 to 20 minutes or until toothpick comes out slightly sticky.