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Key Lime Pie



12 slice(s)


  • 125 g unsalted butter, diced, plus extra for greasing
  • 225 g digestive biscuits
  • 25 g fold caster sugar


  • 2 Limes, thin peelings of skin
  • 1 tbsp golden caster sugar
  • 4 egg yolks, from large eggs
  • 350 g condensed milk
  • 90 g lime juice, (approx 4 limes)
  • 6
    5h 10min
    Preparation 5h 10min
  • 7
  • 8
    • Appliance TM 5 image
      Recipe is created for
      TM 5
      Please note that the TM5 mixing bowl has a larger capacity than the TM31 (capacity of 2.2 liters instead of 2.0 liters for TM 31). Recipes for the Thermomix TM5 may not be cooked with a Thermomix TM31 for safety reasons without adjusting the quantities. Risk of scalding by spraying of hot liquids: Do not exceed the maximum filling quantity and observe the filling level markings of the mixing bowl!

Recipe's preparation

  1. Preheat oven to 180°C. Grease base and sides of a spring form tin (Ø22cm) generously with butter.
  2. Place digestives and sugar in mixing bowl then crush 10 sec/speed 6.
  3. Add butter and mix 7 sec/speed 5.
  4. Spread mixture into base of prepared tin then, use a spoon to press firmly into base and approx. 3.5 cm high up sides of tin, forming a firm biscuit layer.
  5. Bake for 10 minutes (180°C) then remove from oven and allow to cool. Leave oven on and clean mixing bowl then prepare filling.
  6. Filling
  7. Place lime peel and sugar in mixing bowl then grind 40 sec/speed 10. Transfer to a bowl and set aside.
  8. Insert butterfly whisk and add egg yolks then whisk 20 sec/speed 3.
  9. Mix 2 min/speed 4 whilst pouring condensed milk into mixing bowl through hole in mixing bowl lid.
  10. Add lime juice and reserved lime zest and sugar then mix 30 sec/speed 4. Pour pie filling over biscuit base and bake for 15 minutes (180°C) until set.
  11. Allow to cool to room temperature, then cover and refrigerate for at least 4 hours. Serve in slices.

Accessories you need



Leftover egg whites can be used to make a meringue topping for the key lime pie, or use to make a batch of meringues.

If base loses shape after cooking, reshape with a spoon before allowing to cool.

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Add a comment
  • Can't wait to try it!!

    Submitted by Tantastic Food Diary on 16. July 2017 - 17:09.

    Can't wait to try it!!

    Tantastic Food Diary

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  • Yum! Made it for supper last weekend and it really...

    Submitted by Monicatm5 on 29. June 2017 - 11:51.

    Yum! Made it for supper last weekend and it really is delicious.

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