Step 1

Preheat the oven to 350ºF/175ºC and position an oven rack to the center position.

Step 2

Measure out all the ingredients.

Step 3

Prepare a 9-inch (23 cm) square baking pan with parchment paper or non-stick spray and set aside.

Step 4

In a large bowl, whisk together the flour (120 grams, 1 cup), sugar (400 grams, 2 cups), cocoa powder (70 grams, ⅔ cup), and salt (½ teaspoon) until well combined.

Step 5

Add the warm melted butter (226 grams, 1 cup) and eggs (4 large) into the bowl with the dry ingredients. Whisk the ingredients together until well combined. The batter will be quite thick. You can also fold in chocolate chips at this point if you want to make them extra chocolatey.

Step 6

Pour the batter into the prepared pan and use a rubber spatula to smooth out. Bake for 30-45 minutes until a tester comes out with moist crumbs. Slightly under baking them will keep them extra moist and chewy.

Step 7

Let cool for at least 10 minutes before slicing, they will be gooey straight out of the oven. You can eat them like this if you like, but they need to cool to completely solidify.