Homemade Lactose-Free Sweetened Condensed Milk
Desserts

Homemade Lactose-Free Sweetened Condensed Milk

ML
By Marie Lefebvre · Updated October 11, 2026

A rich and creamy homemade sweetened condensed milk made with lactose-free milk — a perfect base for cakes, puddings, and sweet treats. This simple 4-ingredient recipe is budget-friendly and easy to whip up on any day. Keep a jar in the fridge or freezer and you'll always have it on hand!

Prep⏱️ 60 min
Servings👥 3 servings
Difficulty📊 Easy
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🛒 Ingredients

3 servings

3
  • 500 g (2½ cups) granulated sugar
  • 1 litre (4 cups) lactose-free milk
  • 4 tablespoons cornstarch
  • 2 teaspoons (10 g) unsalted butter

Directions

  1. 1

    In a heavy-bottomed saucepan, combine the sugar and lactose-free milk. Cook over medium heat, stirring constantly, until the mixture comes to a boil.

  2. 2

    Once boiling, continue to stir and cook for approximately 20 minutes, allowing the mixture to reduce and thicken.

  3. 3

    Add the butter and stir until fully melted and incorporated.

  4. 4

    In a small bowl, whisk the cornstarch together with 6 tablespoons of the hot milk mixture until completely smooth and lump-free.

  5. 5

    Pour the cornstarch slurry back into the saucepan in a thin, steady stream, stirring vigorously.

  6. 6

    Continue cooking for a few more minutes, stirring constantly, until the condensed milk reaches your desired consistency.

  7. 7

    Remove from heat and allow to cool completely before using in your recipes.

  8. 8

    Store in an airtight jar in the refrigerator for up to one week, or in the freezer for up to one month.

💡 Chef's Tip

For an extra smooth result, blend the cooled condensed milk briefly. Steep a vanilla bean in the milk during cooking for a beautifully fragrant version.