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Close up of a slice of vegan pumpkin spice latte cake.
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Vegan Pumpkin Spice Latte Cake

Vegan pumpkin spice latte cake – this easy vegan pumpkin sheet cake topped with fluffy coffee buttercream is dreamily soft, moist and delicious. It is full of warming Fall flavours and is a perfect cake for celebrations.
Course Dessert
Cuisine American
Keyword cake
Prep Time 20 minutes
Cook Time 25 minutes
Servings 16 people
Author Domestic Gothess

Ingredients

Cake:

  • 370 g (3 cups) plain (all-purpose) flour
  • 175 g (1 cup) light brown soft sugar
  • 130 g (⅔ cup) caster (superfine) sugar
  • 2 ½ teaspoon baking powder
  • 1 teaspoon bicarbonate of soda (baking soda)
  • 3 ½ teaspoon pumpkin spice (see post above for instructions to make your own)
  • 1 teaspoon salt
  • 425 g (one 15 oz can) pumpkin puree (see post above for instructions to make your own)
  • 160 ml (⅔ cup) neutral oil (I use sunflower)
  • 135 ml (½ cup + 1 Tbsp) unsweetened non-dairy milk
  • 1 ½ teaspoon cider or white wine vinegar
  • 2 teaspoon vanilla extract

Buttercream:

  • 175 g (¾ cup) vegan block butter (NOT the spreadable kind. I use Naturli Vegan Block) softened
  • 2 tablespoon instant espresso powder
  • 250 g (2 cups) icing (powdered) sugar sifted (plus extra if needed)
  • 1 teaspoon vanilla extract

Instructions

  • Preheat the oven to 180°C/160° fan/350°F/gas mark 4. Grease a 23 x 33 cm / 9 x 13 inch rectangular cake tin and line it with baking parchment.
  • Whisk together the plain flour, light brown soft sugar, caster sugar, baking powder, bicarbonate of soda, pumpkin spice and salt in a large mixing bowl.
  • Add the pumpkin puree, sunflower oil, non-dairy milk, vinegar and vanilla extract and whisk gently until no dry lumps remain but be careful not to over-mix.
  • Transfer the batter to the prepared tin and spread it level. Bake for about 25 minutes until a skewer inserted into the centre comes out clean or with a few moist crumbs but no wet batter.
  • Leave the cake to cool in the tin for 15 minutes then carefully lift it out onto a wire rack and leave it to cool completely before icing it.
  • To make the coffee buttercream, place the softened vegan block butter and instant espresso powder in a bowl and whisk until smooth.
  • Add the sifted icing sugar and vanilla extract and whisk on a high speed for a good few minutes until the buttercream is very light and fluffy and the espresso powder has dissolved.
  • If it is too thick you can whisk in a little non-dairy milk, ½ teaspoon at a time. And if it is too soft you can either whisk in more sifted icing sugar or pop it in the fridge for 15 minutes to firm up a bit.
  • Spread the buttercream over the cake, decorate as you like and serve.

Notes

  • For the best results make sure that you follow the recipe closely. As always, I highly recommend weighing your ingredients using the gram measurements (with a digital scale), rather than the cup conversions. Cup measurements are simply not accurate enough for baking and I cannot guarantee the best results if you use them.
  • If you are using tinned/canned pumpkin puree, make sure that it is 100% pumpkin, NOT pumpkin pie filling.
  • The buttercream is quite soft and may get a bit melty if it is warm out. If you want to make a more stable buttercream you can swap 50g of the vegan butter for vegetable shortening (such as Trex).
  • For the buttercream, if you don’t have any instant espresso powder you can use instant coffee granules instead, but you will need to mix them with 2 teaspoon non-dairy milk to dissolve them before adding to the butter.