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Zucchini Upside-Down Cake

October 24, 2018 by Joy the Baker 9 Comments

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I can feel bath season coming on.  I can expect for my shower curtain to be untucked from my bathtub, I can expect to make a new batch of mustard bath soak every week, I can expect to likely drop my phone into the water before bath season is done.  

Bath season is also vegetable season though every season is technically vegetable season.  It’s my desire for everything roasted and toasted that led me to this place, with both mustard bath ingredients and zucchini cake ingredients on my kitchen counter. 

All of this to say that… I put vegetables on our cake (not mustard – not yet). I took a perfectly lovely spice cake and not only put vegetables inside, I put them on top, well… bottom, too.  Fall seems like a good time to experiment with ways we can roast, toast, and caramelize so let’s! 

This is a simple fall spice cake, the kind you toss together in one bowl with a whisk making it a very reasonable cake to make on a weekend morning, or weekday night.  It’s an everyday cake and we’re technically getting our vegetables in, too so technically, we all win! 

Here’s what you’ll need for this flipped spice cake:  

  • a heap of raw shredded zucchini plus sliced zucchini rounds for the bottom of the pan / top of the cake.
  • brown sugar and butter that will make a quick caramel in the bottom of the cake pan. 
  • flour and leavening and salt because cake. 
  • cinnamon and nutmeg and maybe a few shakes of ground ginger if you’re feeling it. 
  • eggs to bind and oil to moisten the batter.

Start by whisking the sugars together with the eggs.  

You can do this by hand with a whisk – just whip to glossy and smooth.  

Add the oil and whisk to combined.  

I use oil for this cake because I think it makes for a more moist crumb.  Besides, we’ll get plenty of butter flavor from the bottom of the pan as the cake batter cooks atop butter, brown sugar, and zucchini rounds.  

Into the wet batter with the shredded zucchini, adding even more moisture to the final cake. 

To our flour we’ll add ground cinnamon, freshly grated nutmeg, and salt. 

And gently spoon the flour into the wet ingredients.  

I found that whisking the flour into the wet ingredients in two batches did the trick! 

The batter will be glossy and a pourable thick, studded with zucchini shreds.  Similar to a pancake batter which… I feel like you could very easily fry this batter on a griddle and call it a pancake – but that’s a cake for another time. 

Allow the batter to rest while you melt the butter in the cake pan.  

Just allow the butter to melt in the cake pan as the oven preheats.  Sprinkle with brown sugar. 

And pack in the zucchini rounds. 

Pour the thick batter over the zucchini and butter mixture.  The next time we see these gems they’ll be cooked and lightly caramelized!

See those little peaks of butter around the edges?  That’s the good stuff.  All that flavor will bake into the outside of the cake.  

Bake the cake for 30 minutes or so… maybe a touch longer, until the cake is just firmed through the center. 

Remove from the oven and start the countdown!  I give this cake 10-15 minutes of rest in the pan before running a butterknife around the edges of the pan and inverting it (as confidently as you can) onto a serving platter or cooling rack.  

You could enjoy this cake just as it is – because wow it’s simple and delicious. OR you could sprinkle the cake with more granulated sugar and bust out the kitchen torch!  

I like a little caramelized crisp to this cake so torch it just before serving.  Or just serve plain and feel like you’re eating your vegetables with your cake and everything is A-OK! 

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Zucchini Upside-Down Cake

★★★★★ 5 from 1 reviews
  • Author: Joy the Baker
  • Prep Time: 30 minutes
  • Cook Time: 30 minutes
  • Total Time: about 1 hour
  • Yield: serves 6-8 1x
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Ingredients

Scale

For the Cake:

  • 2/3 cup vegetable oil
  • 2 large eggs
  • 1 teaspoon pure vanilla extract
  • 1/2 cup granulated sugar
  • 1/2 cup lightly packed light brown sugar
  • 1 1/2 cups shredded zucchini
  • 1 3/4 cup all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1 teaspoon ground cinnamon
  • 1/4 teaspoon freshly grated nutmeg

For the Upside-Down Zucchini Situation:

  • 3 tablespoons unsalted butter
  • 3 tablespoons light brown sugar
  • 1 or 2 zucchini, sliced into rounds about 1/2-inch thick, as many as you need to cover the bottom of the pan in a single layer
  • 3 tablespoons granulated sugar, to brulee

Instructions

  1. Place a rack in the upper third of the oven and preheat oven to 350 degrees F.
  2. In a medium bowl, whisk together oil, eggs, vanilla and sugars until well combined, smooth, and glossy. Add the shredded zucchini and stir to combine.
  3. In a small bowl whisk together flour, baking soda, baking powder, salt, and spices.
  4. Add the dry ingredients all at once to the zucchini mixture. Whisk into a thick batter, making sure to scrape along the bottom of the bowl to find any hidden bits of flour or wet ingredients.
  5. Place butter in a 8-inch round pan. Place the pan in the oven for just a few minutes to melt the butter.
  6. Remove the hot pan from the oven, sprinkle with half of the brown sugar, top the sugar and melted butter with zucchini rounds to cover the bottom of the pan. Sprinkle with the remaining sugar and top with the cake batter.
  7. Place in the oven and bake for 30 to 35 minutes, until the cake is cooked through. Test with a toothpick in the center of a cake, if the toothpick comes out doughy the cake needs more time in the oven. If the toothpick comes out with a few moist crumbs, it’s done baking!
  8. Allow the cake to cool for 15 minutes. Use a butterknife to slide around the edge between the cake and the pan. Invert the cake onto a plate, zucchini side up.
  9. Just before serving, sprinkle the cake with granulated sugar and use a kitchen torch to brown the sugar and toast the zucchini. Enjoy immediately!

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Reader Interactions

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  1. AmbalaCakes

    October 26, 2021 at 10:47 pm

    Very interesting

    ★★★★★

    Reply
  2. ProkTools

    October 29, 2018 at 4:54 am

    This is extremely delicious and versatile. Thanks for sharing. For those who eat cake, I find that adding a little more cream to the dressing adds a wonderful flavor. I used sharp knife to cut cake and to make my knife sharp I use Best Electric Knife Sharpener

    Reply
  3. Ann

    October 27, 2018 at 12:22 am

    My mom has made her squashcake since before I can remember. It is childhood to me. Sometimes with frosting, sometimes with nuts in it, and sometimes with bits of dark chocolate in it. Oh, it is the most moist, delicious, wonderful thing in the world. It is her go-to cake, and we always eat every last bit of it.
    And right now it is 8:20 in the morning in Denmark, and I feel the need for cake for breakfast.
    Your recipe looks really good! I need to call my mom up this weekend and ask for her recipe again – see how yours differs from hers. Try yours, and perhaps I’ll end up with something in between that will be my version.

    Reply
  4. Jane

    October 26, 2018 at 4:08 pm

    Not to downplay the upside down cake, but the wood on the table has me wishing I had a table like that. I’m sure it must be a special crafted table. Absolutely beautiful. Can you share the origin?

    Reply
  5. ann

    October 25, 2018 at 7:48 pm

    I want to pin this recipe but when I went to your share link it is no longer there. Was this an oversight?
    Also, how many does this serve-8? Thanks-love your site!

    Reply
  6. auntiemaryann

    October 25, 2018 at 7:32 pm

    I’ve been making an Apple Skillet Cake since the 70’s, also upside down. Since the apple slices are crescent shaped, it takes about 3 apples to fill in the space. I think if you used half-circles and really crowded them in there, or overlapped the whole circles, you’d use a lot more zucchini. I like this take on Zucchini Cake.

    Reply
  7. DeeDee

    October 24, 2018 at 5:15 pm

    What a clever idea!!

    Reply
  8. Erica Lea | Buttered Side Up

    October 24, 2018 at 1:23 pm

    That’s brilliant to put zucchini IN the cake as well as on the bottom! I wonder if I could get my kids to eat zucchini in cake form. ?

    Reply
    • Alicen

      November 5, 2018 at 6:33 am

      If you peel the zucchini before shredding it – pretty much guaranteed they’ll eat it without even noticing it is in there! Also definitely worth trying to have them eat it peel and all. I told my kids its just like carrot cake and they gobbled it up :) Good luck!

      Reply

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