(Almost) Pumpkin Whoopie Pies

butternut squash whoopie pie recipe

Hello there bakers!

This recipe came about because of a desire to bake with vegetables.  Everybody knows baked goods made with vegetables are 100% healthy and nutritious, right?  The “almost” pumpkin title comes from the fact that these whoopie pies are made with the pumpkin’s younger, more beautiful, more delicious sister – the butternut squash.  Us Brits can sometimes play it safe and only tend to bake with carrots, but never other vegetables like our daring friends in the States.  I want to convince you all, and myself, that delicious sweet treats can be made from vegetables such as beetroot, courgettes (zucchini to those on the other side of the pond) and pumpkin to name a few.  So in continuing with the American theme of baking with veggies – what is more American than whoopie pies???  Well…lots of things, but just go with me on this!

butternut squash pumpkin

If you aren’t keen on the fruits of the gourd family, fear not, the taste of butternut squash isn’t overwhelming in this recipe.  The squash adds a lovely moistness and is complemented by the flavours of cinnamon, nutmeg and muscavado sugar.

butternut squash pumpkin puree

This whoopie pie has a more cakey than cookie texture, and the cool vanilla bean buttercream sandwiched in between balances out the spiced flavours perfectly.

butternut squash pumpkin batter

I adapted this whoopie pie recipe from one I found on a few US blogs, and converted the measurements from cups to grams (I know, you’re welcome).  You will need 110g of pureed butternut squash.  I got 450g of puree from a squash weighing around 950g.   I have heard that Waitrose and Tesco sell tins of Libby’s canned pumpkin puree, which isn’t actually made with pumpkin, but is in fact made with squash!  If you’re able to find Libby’s in your local supermarket, please let me know in the comments below!  If you’d like to puree your own squash, and it is extremely easy, then click here for a really easy “how to” guide.  I don’t own a large enough food processor, so just used a handheld immersion blender, which worked beautifully.

whoopie pies on their baking tray

You can freeze your leftover puree in ziploc batches of 220g (that’s one American cup) – they’ll keep for up to 3 months before they have to be thrown.

vanilla bean buttercream

So let’s get started!

Butternut Squash Whoopie Pies

  • Servings: 12
  • Time: 1hr 30mins
  • Difficulty: easy
  • Print



Whoopie pie

  • 280g plain flour
  • 1/2 tsp salt
  • 1/2 tsp baking powder
  • 1/2 tsp baking soda
  • 1 TBS ground cinnamon
  • 1/2 tsp ground nutmeg
  • 1/4 tsp ground ginger
  • a pinch of all spice/mixed spice
  • 100g granulated or caster sugar
  • 115g light muscavado  sugar
  • 120ml sunflower oil (or other tasteless cooking oil)
  • 110g butternut squash puree
  • 1 large eggs
  • 1tsp vanilla extract


  • 200g butter, room temperature
  • 400g icing/confectioners sugar
  • 1 vanilla bean
  • 3 TBS milk


  1. Line a baking tray with parchment paper and heat your oven to 180C/350F/Gas Mark 4
  2. In a bowl, sift together the flour, baking soda, baking powder, salt and spices
  3. In another bowl whisk together the sugars and oil until incorporated
  4. Add the puree and whisk until incorporated, then mix in the eggs and vanilla extract
  5. Pour the wet mixture into the flour mixture and stir until incorporated, with no traces of flour visible. The batter will be soft, but not runny.
  6. Use an ice cream scoop (my scoop is 2″ wide) to place the batter onto baking tray, leaving at least an inch of space between each whoopie pie
  7. Bake on the middle shelf of your oven for 18 mins, or until a toothpick comes out clean, with a few moist crumbs
  8. While the whoopies are cooling, use an electric mixer beat the butter on a high speed for 1 min.  Scrape the vanilla seeds from the pod and add to the butter, whip for another 30 secs until beans are evenly distributed.  Slowly (trust me) add the icing sugar and beat on a low speed until incorporated.  Add the milk 1 tablespoon at a time and whip on a high speed for a further 2 mins, until the buttercream is smooth and creamy.  It should still be a bit firm so that it can hold under the weight of the whoopie pie
  9. Use a piping bag or a spoon to distribute the buttercream between each whoopie pie and sandwich together.

The whoopie pies can be eaten immediately or (if they last that long) can be stored in an airtight container for 3 days.

(Whoopie pie recipe adapted from Sweet Twist of Blogging and Brown Eyed Baker.  Buttercream recipe my own.)

butternut squash pumpkin whoopie pie bitten

Will you be trying to bake with more vegetables in the future?  Did you have a go at making this recipe?  Let me know how you got on in the comments and don’t forget to give this post a “thumbs up” using the button below 🙂

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  1. Qualified sample tester looking for a job……. send cakes to office in Victoria

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