Perfect Chewy Homemade Brownies

INGREDIENTS

6 1/2 oz

all-purpose flour ((1 1/4 cups using Scoop & Sweep Method))

4 oz

Dutch-processed cocoa powder ((1 cup, see notes))

large eggs

large egg yolk

1 lb

granulated sugar ((3 1/2 cups))

3/4 tsp

kosher salt

Optional: 1 teaspoon espresso powder

6 oz

unsalted butter, (melted)

1/4 cup

vegetable or grapeseed oil ((70 ml))

1 tsp

pure vanilla extract