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vanilla cupcakes with blue buttercream frosting.
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5 from 1 vote

Blue Cupcakes

Easy soft vanilla cupcakes frosted with simple blue buttercream.
Prep Time30 minutes
Cook Time15 minutes
Total Time45 minutes
Course: Dessert, Snack
Cuisine: Fusion
Diet: Low Salt, Vegetarian
Servings: 12 cupcakes
Calories: 356kcal
Author: Kachina

Ingredients

Vanilla cupcakes

  • 110 g unsalted butter room temperature
  • 115 g white sugar finely granulated e.g. caster
  • 1 teaspoon vegetable oil or other neutral oil e.g. sunflower
  • 2 eggs large
  • 115 g plain all-purpose flour see notes for self-raising flour swap
  • 1 ½ teaspoon baking powder
  • 1 tablespoon milk whole or semi-skimmed
  • 1 teaspoon vanilla extract
  • teaspoon salt optional

Blue buttercream

Instructions

Vanilla cupcakes

  • Preheat oven: 180°C / 160°C (fan) / Gas Mark 4 / 350°F
  • In a medium bowl, cream together the butter, sugar and oil, either using a spatula, electric hand mixer or stand mixer, until light and pale.
  • Beat in the eggs one at a time until fully combined.
  • Sieve the flour and baking powder into the mixture, gently folding in until just combined.
  • Stir in the milk, vanilla extract and salt.
  • Line your cupcake pan with cupcake cases and fill each up to ½ to ⅔ full with batter. This should make 10-12 cupcakes, depending on case size.
  • Bake in the oven for 15-20mins or until the cupcakes are lightly golden, springy to the touch and an inserted skewer comes out clean from the middle.
  • Transfer the cupcakes to cool on a wire rack while you make the frosting.

Blue buttercream

  • Beat the butter (either by hand, using an electric mixer or stand mixer) until pale, light and fluffy. This could take several minutes.
  • Sieve half of the icing sugar into the butter and beat until combined, then repeat this with the remaining half of the icing sugar.
  • Add in the vanilla extract, milk and salt (if using) mixing until only just smooth.
  • Stir in a few drops of blue food colouring at a time until you reach the desired shade.

Assembly and decoration

  • Once your cupcakes have fully cooled, add your buttercream to a piping bag fitted with a large nozzle of your choice (e.g. an open star like Wilton 1M) or use a freezer bag and cut off one corner.
  • Pipe the blue buttercream onto your cupcakes and enjoy!

Video

Notes

Storage: Keep blue cupcakes in an airtight container at room temp. for up to 4 days.
Freezing: You can freeze your blue cupcakes in an airtight container (or cling film plus foil) for up to 3 months.
Top tips:
  • Use softened room-temperature butter for ease of mixing.
  • Your cupcakes are cooked once they're risen and springy to the touch. An inserted toothpick or skewer should also come out clean from the middle.
  • Use sturdy cupcake cases or baking cups so they don't peel with moisture.
  • For creamy frosting, beat your butter until it’s pale, light and fluffy first. This could take several minutes with an electric mixer.
  • Stop adding colouring a shade less intense than you'd like. Food colouring develops stronger over time.
Substitutions:
  • Swap your plain flour for self-raising flour and reduce the baking powder to only ½ tsp.
  • You can swap the milk for any type, including dairy-free alternatives, or heavy cream.

Nutrition

Calories: 356kcal | Carbohydrates: 46g | Protein: 2g | Fat: 19g | Saturated Fat: 11g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Trans Fat: 1g | Cholesterol: 74mg | Sodium: 117mg | Potassium: 33mg | Fiber: 0.3g | Sugar: 38g | Vitamin A: 587IU | Calcium: 45mg | Iron: 1mg