Key Lime Pie

Key Lime Pie

Serves 8 637 kcal per serving Prep 20 min Cook 20 min Passive 3 h

Ingredients

  • 300g Digestive Biscuits
  • 150g Butter
  • 400g Condensed Milk
  • 3 Egg Yolks
  • 4 Lime
  • 300ml Double Cream
  • 1 tbls Icing Sugar

Instructions

  1. Preheat the oven to 160°C (140°C fan). Blitz the digestive biscuits into fine crumbs using a food processor, or place them in a sturdy bag and crush with a rolling pin. Transfer to a bowl, add the melted butter, and mix until evenly combined.
  2. Press the biscuit mixture firmly into the base and up the sides of a 22 cm loose-based tart tin, compacting it well. Bake for 10 minutes, then remove from the oven and allow to cool completely.
  3. To make the filling, place the egg yolks in a large bowl and whisk with an electric mixer for about 1 minute until slightly thickened. Add the condensed milk and whisk for about 3 minutes until smooth and creamy. Add the lime zest and juice and whisk again for 2–3 minutes until fully combined.
  4. Pour the filling into the cooled crust and smooth the surface. Return the pie to the oven and bake for about 15 minutes, until the filling is just set.
  5. Remove from the oven and allow to cool completely, then refrigerate for at least 3 hours or preferably overnight.
  6. When ready to serve, carefully remove the pie from the tin and transfer to a serving plate. Whip the double cream with the icing sugar to soft peaks, then dollop or pipe it over the pie. Finish with extra lime zest and serve chilled.

Tips

  • Use authentic Key limes if available; they are smaller, more acidic, and have a more floral aroma than Persian limes.
  • Whisk the condensed milk and lime juice thoroughly; the acid will naturally thicken the proteins in the milk.
  • Bake the crust briefly before adding the filling to ensure it stays crunchy and holds its shape.

Variations

  • Meringue Topped: Top with a toasted Swiss meringue instead of whipped cream for a classic southern finish.
  • Coconut Crust: Mix shredded coconut into the graham cracker crumbs for a tropical twist.

Storage

Store in the refrigerator for up to 4 days. Key lime pie also freezes exceptionally well; eat it semi-frozen for a refreshing treat.

Serving Suggestions

  • Top with generous dollops of unsweetened whipped cream and thin lime slices.
  • Serve chilled on a hot summer afternoon as a refreshing palate cleanser.

Frequently Asked Questions

Can I use regular limes?

Yes, Persian limes work well, though the flavor will be slightly less tart and aromatic than with true Key limes.

Does the filling need to be baked?

While the acid thickens the milk, baking for 10-15 minutes ensures the egg yolks are safe and the pie sets firmly.

Why is my pie yellow, not green?

Authentic Key lime pie is naturally pale yellow due to the egg yolks and lime juice; green pies usually contain food coloring.

instructions_source: editorial-classic