In a large microwave safe bowl place butter and chocolate. Microwave on high for 1-2 minutes. Stir well after each minute. You want the chocolate to be completely melted.
Add sugar and vanilla and stir well
Allow mixture to cool slightly and then mix in eggs
Mix in flour
Fold in raspberries carefully so the raspberries are well incorporated but not squashed
Pour into a greased rectangular glass baking dish
Bake at 350 degrees for 40 minutes
Remove from oven and allow brownies to fully cool before slicing
Notes
Tips:
Make certain you are using good quality unsweetened chocolate
Break chocolate into small pieces - it makes it easier to melt
You can use fresh or frozen raspberries
If using frozen raspberries, do not thaw berries. Add frozen berries to the batter. Increase baking time by 5 minutes.
Bake for the recommended baking time. Brownies will be gooey in the center.