Farm Stand Brownies

From bon appetit.

Heat oven to 350f.

Line a 13x9 pan with foil and butter the foil.

Place chocolate chips and butter in a saucepan and stir constantly over medium-low until melted and smooth.

Add espresso powder and vanilla and stir.

Cool 15 minutes.

Whisk flour , baking powder , and salt in a small bowl.

Add walnuts and toss to coat.

Whisk eggs and sugar in a large bowl just to blend.

Add chocolate mixture and stir to blend.

Add flour mixture and stir to just blend.

Pour into pan.

Bake until a tester comes out with moist crumbs , about 35 minutes.

Cool completely.

Cover and chill for 6 hours.

Remove from pan to work surface.

Cut into 16 pieces.

semi-sweet chocolate chips, butter, instant espresso powder, vanilla, flour, baking powder, salt, walnuts, eggs, sugar