Poppyseed Kolachky Filling

A traditional Central European poppy seed filling for kolachky pastries, made with just three ingredients: poppy seeds, scalded milk, and sugar. This is the old-world method passed down through Czech and Polish baking traditions, where poppy seed filling (called mak) is a staple during the holidays.

Scalding the milk is essential. Hot milk softens the poppy seeds and helps them absorb the liquid as the mixture cools. Cold milk won’t penetrate the hard seed shells, and you’ll end up with a gritty, dry filling instead of a smooth, spreadable paste.

A full pound of poppy seeds makes a generous batch, enough for several dozen kolachky. Let the filling sit until the milk is completely absorbed and the mixture has cooled to room temperature. This can take up to an hour. The filling should be thick and paste-like, not loose or runny.

Chef Tips

• Grind the poppy seeds before mixing if you want a smoother filling. A spice grinder or clean coffee grinder works well. Whole seeds give a more rustic, textured result.
• Scalded milk means heated just until tiny bubbles form around the edges, not a full rolling boil. Boiling changes the flavor.
• This filling keeps in the fridge for up to a week. Make it ahead so it’s ready when your kolachky dough is.
• If the cooled filling seems too thick, stir in a tablespoon of milk at a time until spreadable.

Variations

• Add a teaspoon of vanilla extract or almond extract after cooling for extra flavor.
• Stir in a tablespoon of honey in place of some sugar for a richer, more floral sweetness.
• Mix in finely grated lemon zest for a bright citrus note that pairs beautifully with poppy seeds.