A chocolate chip slides into the cake’s crevasse. Such a fate!

We’re here, friends! At the end of the squash vine. It’s been an interesting trip.

It’s been sweet. It’s been savory. There’s been heartbreak and 71 Chips Ahoy! cookies. Thanks for sticking it out with me. I’ve saved my favorite zucchini recipe for last.

A year ago, I was testing chocolate zucchini cake recipes to find my favorite. Last year, like this year, I had a bumper crop of summer squash, and I was desperate to use it up.

I made this chocolate zucchini cake from Simply Recipes a bunch of times. Its orange zest, bundt shape, and walnuts had me over the moon. It was moist, and it used up two cups of squash at a crack. Case closed.

Then I baked this recipe from King Arthur Flour, and I’ve never looked back.

Cocoa powder and espresso powder are stirred into the batter.

The KAF recipe also calls for two cups of shredded zucchini (OK, I’m listening). But then there are chocolate chips in the cake (tell me more) and on top of the cake (double chips, eh?). Erin likey.

It was the espresso powder, though, that really did me in. It amplifies the chocolate with its smoky, bitter flavor. Consequently, the cake is not cloyingly sweet, like a grocery store chocolate cupcake.

Espresso is like a complementary color to chocolate. It makes the chocolate glow a littler brighter, hum a little louder. Add a touch of espresso or coffee (powder or liquid) to the next chocolate thing you bake. The chocolate flavor will be more intense, but not sweeter.

I used Ghiradelli bittersweet chocolate chips. They’re my standard chip. I love the matte browns of the cocoa powder and espresso powder. And boy, did that smell good.

The KAF cake also is more moist than my ex-favorite cake, and because of that, I think the squash is less prominent. Eaters tell me that they never would have known there was squash in the cake had I not advertised it.

Thanks again for reading my zucchini diary. I hope you were inspired to seize the squash (not a euphemism) and explore its myriad applications. Let me know what you made with your zucchini!

I didn’t bother weighing this squash before I shredded it for the cake. I wanted to use it all up!

Following are links to the Dear Zucchini Diary recipes:
Lasagna tart
Warm summer squash salad
Zucchini chocolate chip cookies
Summer squash gratin
Summer squash with easy pesto
Lemon-zucchini cornmeal cookies

Chocolate Zucchini Cake
Adapted from King Arthur Flour

1/2 cup (1 stick) butter
1/2 cup (3 1/2 ounces) vegetable oil
1 3/4 cups (12 1/4 ounces) granulated sugar
1 teaspoon vanilla
1 teaspoon baking soda
1/2 teaspoon baking powder
1/2 teaspoon salt
2 large eggs
1/2 cup (4 ounces) yogurt or sour cream (I used plain yogurt.)
2 1/2 cups (10 1/2 ounces) unbleached all-purpose flour
3/4 cup (2 1/4 ounces) Dutch-process cocoa
2 teaspoons espresso powder (optional, but please don’t skip this!)
2 cups (12 ounces) shredded summer squash (or more if you are sick of cooking with squash and want to get rid of it, ha ha)
1/2 cup (3 ounces) chocolate chips
1 cup (6 ounces) chocolate chips (for topping)

Heat oven to 325 degrees Fahrenheit. Grease a 9-by-13-inch pan.

In a large mixing bowl, cream together butter, oil, sugar, vanilla, baking soda, baking powder, and salt. Beat in the eggs, one at a time. (For me, this recipe is a chance for some quality time with my stand mixer.)

Add a little flour, add a little yogurt. And so it goes till both are completely added.

Stir in yogurt alternately with the flour. Don’t forget to scrape down the sides of the bowl from time to time.

Add cocoa and espresso powder. Mix until smooth.

Fold in squash and 1/2 cup chocolate chips.

Yes, it’s a lot of squash, but it disappears into this moist cake.

Pour batter into prepared pan, and bake for 35 minutes. (I find that this cake is long baking.) Take the cake from the oven when the top springs back when lightly touched. Sprinkle the cake evenly with 1 cup of chocolate chips and return it to the oven for 5 minutes.

Remove cake from the oven and allow it to cool before serving. Like so many chocolate baked treats, this cake is better on the second day. Let it sit overnight at room temperature.

I split the cake batter into two pans. One cake for VHHQ, one cake for work.