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The easiest and most delicious Lime & Coconut Slice you'll ever make! Made from crushed biscuits, butter, sweetened condensed milk, coconut & lime juice with a creamy and tangy lime frosting. Conventional & Thermomix printable recipe cards included. 

Coconut & Lime Slice

The easiest and most delicious Coconut & Lime Slice you'll ever make! Made from crushed biscuits, butter, sweetened condensed milk, coconut & lime juice with a creamy, tangy lime frosting.
5 from 7 votes
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Course: sweet
Cuisine: Slices
Keyword: lime slice
Prep Time: 15 minutes
Chilling Time: 2 hours
Total Time: 15 minutes
Servings: 20 pieces
Calories: 269kcal
Cost: $10

Equipment

  • Food processor, rolling pin or Thermomix

Ingredients

  • 250 g plain sweet biscuits like Arnott's Marie biscuits, see notes
  • 90 g (1 cup) desiccated coconut
  • grated zest from 3 limes
  • 80 g butter melted
  • 250 g (¾ cup) sweetened condensed milk
  • 90 ml (6 tbs) lime juice approx 3 limes

For the lime frosting:

  • 360 g (3 cups) icing sugar see notes
  • 90 g butter room temperature
  • 75 ml (5 tbs) lime juice approx 2-3 limes
  • 30 g (3 tbs) desiccated coconut

Instructions

Conventional Method

  • Grease and line a 22cm x 32cm rectangular slice tin with baking paper.
  • Crush biscuits and place into a bowl. Add coconut and grated lime zest. Mix to combine.
  • Add melted butter, condensed milk and lime juice to the biscuit mixture. Mix thoroughly until well combined.
  • Press into the prepared tin. Place into the fridge.
  • In a bowl, whisk the icing sugar, butter and lime juice in a bowl until creamy and 'frosting-like' - if the frosting is too thick to spread, add a little more lime juice.
  • Spread the frosting over the slice, sprinkle with the extra coconut and place back into the fridge to set completely (a minimum of 2 hours chilling time is required).
  • Cut into slices.

Thermomix Method

  • Grease and line a 22cm x 32cm rectangular slice tin with baking paper.
  • Cut the lime rind off with a sharp knife. Place the lime rind into the Thermomix bowl and chop finely for 50 seconds, Speed 8 or until it has a finely grated feel (you will need to scrape down the sides of the bowl a few times).
  • Add the biscuits and crush for 10 seconds, Speed 7, or until the biscuits resemble fine crumbs. Set the biscuits and lime zest aside.
  • Place the butter into the Thermomix bowl and melt for 2 minutes, 60 degrees, Speed 3 (you may need to scrape the sides of the bowl down with a spatula after 1 minute).
  • Add the sweetened condensed milk and lime juice. Mix for 5 seconds, Speed 3 or until well combined.
  • Add the dry biscuit mixture and the coconut to the Thermomix bowl. Mix all ingredients together for 5 seconds, Speed 4. Scrape down the sides with a spatula and mix again for 10 seconds, Speed 4.
  • Firmly press the mixture into the prepared tin and place into the fridge.
  • Place the icing sugar, butter and lime juice into the Thermomix bowl and mix for 20 seconds, Speed 4. Scrape down the sides of the bowl with a spatula. Mix for a further 30 seconds, Speed 4.
  • Spread the frosting over the slice, sprinkle with the extra coconut and place back into the fridge to set completely (a minimum of 2 hours chilling time is required).
  • Cut into slices.

Video

Notes

RECIPE NOTES & TIPS
Ingredients Info:
  • Butter - you can use either salted or unsalted butter in this recipe.
  • Sweetened condensed milk - it's important to use full fat sweetened condensed milk in this slice as the skim version will not set as firmly.
  • Plain sweet biscuits (cookies) - I like to use Arnotts Marie Biscuits for this recipe but any plain sweet biscuit will work well (such as digestives or Graham crackers).
  • Desiccated coconut - use fine dried desiccated coconut in this recipe.
  • Lime juice - you can use either fresh or bottled lime juice in this recipe but I prefer freshly squeezed lime juice if available.
  • Lime zest - finely grate the green skin from fresh limes.
  • Icing sugar - you can use either pure icing sugar or icing sugar mixture in this recipe. Personally, I prefer pure icing sugar as it sets firmer which is better for lunch boxes.
More Recipe Tips: 
  • Lemon variation - Click here for the lemon version of this slice.
  • Icing - if the icing mixture is too soft, add a little extra icing sugar and mix. If it's too firm to spread, add a small amount of extra lime juice.
  • Storing - store in an airtight container in the fridge for up to 1 week.
  • Freezing - freeze the slice in an airtight container for up to two months. Bring to room temperature before serving.

Nutrition

Calories: 269kcal | Carbohydrates: 34g | Protein: 2g | Fat: 14g | Saturated Fat: 9g | Cholesterol: 25mg | Sodium: 144mg | Potassium: 92mg | Fiber: 1g | Sugar: 27g | Vitamin A: 255IU | Vitamin C: 1.5mg | Calcium: 44mg | Iron: 0.6mg