INGREDIENTS
1/2 cup
(1 stick) melted butter, plus more for pan
1/2 cup
unsweetened cocoa powder, plus more for pan
1 1/4 cups
all-purpose flour
1 tsp
baking soda
1 tsp
ground cinnamon
1/4 tsp
kosher salt
1 cup
sugar
1
large egg
1
large egg yolk
1 tsp
pure vanilla extract
2 cups
grated zucchini (from 1 large or 3 small)
2/3 cup
semisweet chocolate chips
Flaky sea salt