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Pale rum in a plain carafe and small glass

Rum

Rum flavors the chocolate-hazelnut buttercream in polenta e osei dolce, measured separately from the cake’s Curaçao syrup.

Italian pastry role
An ingredient in the chocolate-butter mixture.
Measurement
Weighed in grams for this cake.
Choice
Read the bottle’s strength and product description.

A spirit in the pastry cupboard

Rum flavors the chocolate-hazelnut buttercream in polenta e osei dolce, measured separately from the cake’s Curaçao syrup.

Rum is used in Italian pastry as a measured flavoring ingredient. Pastry products include different rum styles and strengths, so choose the actual bottle for the recipe rather than treating every rum preparation as identical.

Weigh it into the chocolate mixture

Melt the chocolate as directed, then mix in the weighed rum and hazelnut paste. Let the mixture become lukewarm before adding it to the softened butter.

In the Bergamo buttercream

Rum is mixed with melted chocolate and hazelnut paste before that mixture joins the butter. It belongs to the cream, while the orange liqueur belongs to the bagna.

Divide the cream between cakes

For multiple original-size cakes, divide the complete cream accordingly. Keep the rum’s gram amount within its cream allocation and separate from the syrup ingredients.

Choose rum, not a baking aroma

Check the spirit’s label, alcohol strength and ingredients. A rum aroma or a prepared cake-soaking mixture is a different product with its own formulation.

Keep the bottle closed

Follow the producer’s storage instructions and close the bottle after measuring. Keep it away from heat and open flames while working.

Questions worth asking

Is the listed amount a volume?

Weigh the rum in grams for the cream, keeping that allocation separate from the syrup.

Should I add this rum to the Curaçao bagna?

Keep it in the chocolate-butter mixture as directed, separate from the cake syrup.

Worth knowing next

  1. Curaçao liqueur
Sources and citations (2)Last checked October 2026
  1. rum-luxardo
  2. polenta-sonia-reader

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