Step 1

Preheat the oven to 350˚F (175˚C). Spray an 8x8-inch baking pan with cooking spray, or rub it with oil. Line the pan crosswise with parchment paper, leaving an overhang (this will make it easier to pull the brownies out later, but it's optional).

Step 2

In a food processor (or Vitamix), combine the zucchini, vegetable oil, eggs, maple syrup and vanilla. Process until smooth (you’ll still see flecks of green). Add the flour, almond flour, cacao powder, baking powder and salt. Pulse just until incorporated (don’t over-mix). Scrape the sides. Add the chocolate chips and pulse to combine.

Step 3

Scrape the batter into the prepared pan and spread it in an even layer. Bake until the top is matte and a toothpick inserted in the center comes out with damp crumbs, 25-30 minutes. Place the pan on a rack and let the brownies cool for 10 minutes. Using the parchment paper as handles, remove the brownies from the pan (you can skip this step and serve the brownies straight out of the pan if you prefer!). Let cool completely (the sides will shrink in slightly as it cools).

Step 4

Combine the chocolate chips and milk in a small microwave safe bowl or double boiler. If microwaving, cook on high in 15 second intervals, stirring between each, until the chocolate is melted and shiny. If using a double boiler, cook over medium-low heat, stirring occasionally, until the chocolate is melted and shiny.

Step 5

Spread the warm frosting over the brownies. Let the brownies sit until the frosting is set (you can pop them in the fridge for 15 minutes to chill faster… and if you can’t wait that long and need to sneak a bite when the frosting is still melty and gooey, I get it). Slice the brownies and serve!