There is a moment every summer when you open the crisper drawer and find a zucchini the size of your forearm. It just keeps growing, quiet and green, until the whole drawer feels judged.
This year I stopped dreading that moment. Now when the big one shows up, I pull out a box of chocolate cake mix and a jar of peanut butter. The result is a cupcake so rich and fudgy that nobody at the dinner table believes there is a vegetable in it. Kids included.
Why this recipe works
Most zucchini baking tips are the same: the vegetable disappears. That is exactly what happens here. Once the shredded zucchini is folded into the batter, it melts into the cupcakes as they bake and does one job brilliantly. It keeps them soft and moist for days, without adding a single hint of green flavour.
The base is a box of chocolate cake mix, rounded out with instant chocolate pudding, a few chocolatey extras, and a little instant coffee that deepens the cocoa without making the cupcakes taste like espresso.
Where I went off-menu is the frosting. Most of these cupcakes get a chocolate cream cheese top. I wanted something that would make people ask questions, so I made a peanut butter frosting instead. It is creamy, just a touch salty, and it balances the deep chocolate like a dunking moment in a jar of peanut butter. If you have ever dipped a chocolate treat into peanut butter and thought that was genius, this is that idea in a cupcake.
And because it starts from a mix, the whole thing is approachable. No fancy melting, no precision measuring of purpose flour, no mountain of dirty bowls. The batter comes together in one large bowl with a spoon or a sturdy spatula, and the frosting takes a few minutes with an electric mixer.
Ingredients
Everything is in standard US measurements. You will need a cupcake pan and an electric mixer.
For the cupcakes (makes 12 medium cupcakes):
- 1 box chocolate cake mix
- 1 box instant chocolate pudding
- 2 cups zucchini, shredded
- 4 eggs
- 2 teaspoons cinnamon
- 1 tablespoon instant coffee
- 3/4 cup vegetable oil
For the peanut butter frosting:
- 1 1/4 cups creamy smooth peanut butter, room temperature
- 1 1/4 cups powdered sugar
- 1/2 cup butter, room temperature
- 1 teaspoon vanilla extract
The full recipe costs around $12 and comes to 489 kcal per cupcake, if you are keeping count. I rarely do.
5 simple steps
Preheat the oven to 350°F. Total time from start to iced is about 1 hour 20 minutes, and most of that is the cupcakes cooling.
1. Prep the zucchini. Shred it, then press it in paper towels to pull out the excess water. You want it damp, not soggy.
2. Mix the batter. In a large bowl, combine the cake mix, instant pudding, shredded zucchini, eggs, cinnamon, instant coffee, and oil. Mix only until the dry mix is fully incorporated. The batter will be thick, and stopping early keeps the texture tender rather than dense.
3. Fill the tins. Spoon the batter into lined cupcake tins, filling each to about two-thirds full.
4. Bake and cool. Bake for about 30–35 minutes, until a toothpick inserted in the centre comes out clean. Then let the cupcakes cool completely on a wire rack before frosting. I know, waiting is hard. It is worth it.
5. Make the frosting and finish. Beat the peanut butter and butter until pale and light. Beat in the powdered sugar in about 1/4 cup additions, and the vanilla once the frosting thickens. Frost with a piping bag if you have one, or swirl it on with a butter knife and call it rustic. Nobody is grading you.
Make it your own
Three small notes that save bakes:
- Do not overbeat the batter. Mix until just combined. Overbeating develops the gluten in the flour and turns soft, fudgy cupcakes into something dense and chewy.
- Balance the frosting as you go. If it is too soft, add a little more powdered sugar. If it is too stiff, loosen it with a tablespoon of milk.
- Store with confidence. Iced cupcakes keep in an airtight container in the fridge for up to 3 days, or in the freezer for up to 3 months.
The recipe also makes 6 large cupcakes if you line a bigger pan. Nutrition above is for the 12-cupcake version, so work those out separately if you go large.
These have earned a permanent spot in my summer baking rotation. They are the kind of dessert that starts a conversation, which is my favourite thing about a dessert. Usually it goes something like: “Wait, what is in these?” and I get to smile and say, a vegetable.
Start today:
- ✓ Check the crisper drawer and claim your biggest zucchini
- ✓ Put a box of chocolate cake mix and 4 eggs in the next grocery list
- ✓ Pick a weekend morning and set a 1-hour timer
Today’s tiny step: Shred one zucchini and press it dry. That is it. The rest will be ready when you are.
— E, your habit neighbor
If you want more ways to put a garden to work, browse my other dessert recipes“>dessert recipes on Healthy Habit Sphere.