These should look under-done to have that fudge, gooey texture.
Recipe from: http://www.bunsinmyoven.com/2013/01/03/nutella-brownies/
Makes 1 8X8 pan, double recipe for 9X13 pan
INGREDIENTS:
1 stick of butter
10 TBSP sugar
1/4 cup Nutella
2 large eggs
10 TBSP cocoa powder
1/2 teaspoon salt
1/2 teaspoon baking powder
1/2 teaspoon espresso powder, optional
2 teaspoons vanilla
10 TBSP flour
DIRECTIONS:
Butter a 9×13 glass baking dish.
In a small saucepan, melt butter. Stir in sugar and continue cooking for 1-2 minutes, stirring constantly. Do not allow sugar mixture to boil.
Remove from the heat and stir in the Nutella until well combined.
Pour butter mixture into a large bowl, beat in cocoa powder, eggs, salt, baking powder, espresso powder, and vanilla extract.
Mix until well combined. Stir in the flour until just combined. Spread into prepared pan (batter will be very thick and sticky) and bake for about 30 minutes, until a tester comes out mostly clean. The edges should be set and the center should still look slightly moist, but not uncooked. Cool on a wire rack.
Nesting On A Hill 