Homemade Diplomatico Rum Recipes


How to prepare the Italian diplomatico rum.  The main ingredient is Chantilly cream.

The Chantilly cream, created by François Vatel in the seventeenth century, was named after the estate of the Prince of Conde (Chantilly, in fact), where he was superintendent of the kitchen. 

The legendary cream is made fresh whipped cream (by hand, for the purists), vanilla berries and icing sugar in a proportion of 5 parts of cream and 1 sugar.

Among the creams used in confectionery for filling and decorating is definitely a favourite, as simple, light and exquisite taste, is often mixed with other creams, such as pastry, to make them more delicate and lightweight.

Preparation time: 1h 

Cooking time 20 min 

Cost: 10 €

Ingredients for the Diplomatico:

  • Chantilly Cream (set aside)
  • Trifle Sponge
  • Shortcrust pastry (homemade or supermarket) – 375 g
  • Alkermes Liqueur for decoration
  • Cocoa Powder
  • Tip: you can buy the shortcrust pastry in Lidl or Aldi.
  • Rum Syrup (homemade)
  • First, you have to prepare the syrup.
  • Tip1: you can prepare the syrup in advance. If you don’t have rum at home you can use the rum flavour to prepare the syrup.
  • Tip2: The ingredients are for 2 desserts.  

Ingredients for syrup:

  • 100 g Rum (alcoholic) 
  • Sugar 70 gr
  • Water 30 gr

Ingredients for Chantilly Cream:

  • Custard 200 ml (homemade or supermarket)
  • Cream 200 ml
  • Ice Sugar  3 tbs.

Tip: In the link, you can find the recipe for the homemade custard.

Preparation of syrup: 

rum for diplomatico rum

  • Weigh 100 grams of rum
  • Add 70 g of sugar to a small pot

sugar for diplomatico rum

  • Then pour into the pot 30 g of water 

add water to the sugar

  • Melt the sugar until the colour is transparent.

melt sugar on the gas

  • Now, pour the sugar water into the glass with rum

Preparation of  Chantilly Cream 


  • Pour the cream into a bowl and whip cream with electric mixer until the cream is whipped.

use a mixer to mix

  • When it is whipped, gradually add the icing sugar to the cream.

the cream is ready

  • Tip: for a better result, I recommend to use a fresh and high quality cream.
  • Now pour the custard into a second bowl

custard for second cream

  • Add the whipped cream to the custard.

 mix custard and cream

  • Mix well the whipped cream and the custard for 5 minutes. The result of these 2 creams is called Chantilly Cream.

chantilly cream done

Preparation of short pastry:  

shourt court pastry divided in slices

  • Cut the shortcrust pastry in 5 parts and hole several times the pastry with a fork.
  • Tip: I prepared 5 rectangles which are showed separately. I need 4 for the preparation of 2 desserts and 1 for the decoration.
  • Sprinkle the pastries with icing sugar.

add icing sugar

  • Pre heat the oven to 200 degrees and bake the puff pastry until golden.

cook each pastry

  • Once the pastry is cooked, let it to cool down.

other 3 rectangles of cooked pastry

  • Cover the rectangles of pastry with ice sugar.

add extra icing sugar

Now  the preparation of the Diplomatico:  

  • Cover one rectangle with Chantilly cream

add cream

  • if you like, you can add extra cream (see photo below)

add extra cream

  • Wet the sponge with the rum. You can use a pastry brush to do it.

add the sponge

  • Wet the sponge with Alkermes Liqueur on the long length. You can use a pastry brush to do it.

wet the sponge with rum made

  • The sponge is wet with rum and Alkermes Liqueur.
  • Tip: If you don’t have Alkermes Liqueur, you can use the red colour for cakes. 

add red liqueur

  •  Cover the sponge with Chantilly Cream

repeat with chantilly cream

  • Cover the Chantilly cream with cocoa powder

add cocoa on the cream

  • Cover the sponge with a second rectangle of pastry and sprinkle with icing sugar
  • Tip:  You should have 3 rectangles of puff pastry left.

add icing sugar again

  • Finish adjusting the Diplomatico rum –> last step of the preparation

final step: adjust the diplomatico

  • Crumble a rectangle of puff pastry (the 5th one) and cover the external part of the Diplomatico rum where there is not liqueur (on the short length).

crumble for diplomatico

 The Writing or Decoration: 


  • Melt chocolate in water bath
  • Tip: you can decorate its top with your favourite quote, if it suits you. Example: Happy Birthday (Auguri)
  • Keep the dessert in the fridge until 30 minute before serving.

the diplomatico rum is ready

  • Now  you can start the preparation the second Diplomatico, changing the decoration: 

second diplomatico is ready

  • You can serve it after keeping the dessert in the fridge at least for 2 hour. 
  • Once it is cooled down, slice and serve the dessert.

slice of diplomatico rum

Hope you will like as much I did.

Alessandra Simple Recipes

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