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Polka Dot Slice recipe from Baking with Granny. Easy tray bake cake for kids, made with coconut and rainbow chocolate drops (such as Smarties or M&Ms).
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4.75 from 4 votes

Polka Dot Slice

Easy and delicious tray bake, made with rainbow chocolate drops, coconut and vanilla. A family favourite but particularly loved by kids!
Prep Time10 minutes
Cook Time30 minutes
Course: Dessert, Snack
Cuisine: British, Scottish
Keyword: Cake, Tray Bake
Servings: 12

Ingredients

  • 115 g Margarine or Butter softened
  • 115 g Caster Sugar (Superfine Sugar)
  • 2 Free-range Eggs
  • 2 tbsp Milk
  • ½ tsp Vanilla Extract
  • 50 g Desiccated Coconut (Shredded Coconut)
  • 140 g Self-raising Flour
  • 80 g Smarties (M&Ms) approx.

Instructions

  • Preheat your oven to 180°c (160°c for fan-assisted ovens, Gas Mark 4 or 350°F). Grease and line a 11x7 inch tray with some greaseproof paper. Set aside.
  • In a large bowl, cream together the butter/margarine and sugar until light and fluffy. Mix the eggs one at a time, mixing through before adding the next. Add the milk and vanilla extract. Mix through to combine.
  • Add the coconut and mix through until combined.
  • Sift in the self-raising flour and fold together to create a batter.
  • Add the majority of the Smarties/M&Ms, holding back some (to top the Polka Dot Slice with before baking). Mix through until evenly distributed in the batter mixture.
  • Spoon the mixture into your pre-lined tray, spreading evenly to the edges. Top the cake with the remaining Smarties/M&Ms. Bake in your pre-heated oven for 20-30 minutes, until golden in colour, and a skewer inserted to the middle comes out clean.
  • Allow your Polka Dot Slice to cool for a few minutes before sprinkling a little extra sugar over the top of it, whilst still warm. Once completely cool, remove from the tray and cut into individual portions.