Rum Extract Vanilla Custard Popsicles
Smooth, custard-like popsicles with rich sweetened condensed milk, aromatic vanilla, and a subtle rum note. These no-cook treats freeze in 6 hours and require only a few pantry staples. Perfect for a sophisticated frozen dessert that feels indulgent without the fuss.
Steps
Before you start
- Read the recipe start to finish—the custard mixture is simple but freezing takes 6 hours
- Gather all ingredients and ensure your popsicle molds and sticks are clean and dry
- If using wooden sticks, have them ready; some molds include plastic sticks that freeze in place
Combine Base Ingredients
- In a 1-quart mixing bowl, whisk together the sweetened condensed milk, heavy cream, and water until smooth and well combined.
- The mixture should be pale and uniform with no streaks of condensed milk remaining.
- Stir for about 30 seconds to ensure the condensed milk is fully incorporated.
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Ready when: mixture is smooth and evenly blended
Tip: Whisk vigorously to break up any clumps of condensed milk that might linger in the corners of the bowl.
Add Flavoring
- Pour in the vanilla extract, rum extract, and fine sea salt.
- Whisk until the extracts and salt are fully dissolved and distributed throughout the mixture.
- The custard will have a faint amber tint from the rum extract.
- Taste a small spoonful (optional) to ensure the flavor balance suits you; adjust rum or vanilla by a few drops if needed.
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Ready when: extracts and salt are fully incorporated and no visible specks remain
Tip: Taste before freezing if you're uncertain about the rum intensity; it's easier to adjust now than after freezing.
Fill Popsicle Molds
- Carefully pour or spoon the custard mixture into the popsicle mold cavities, filling each to about ½ inch below the rim.
- This leaves space for the mixture to expand slightly as it freezes and prevents overflow.
- Wipe any spilled custard from the mold's exterior with a damp cloth.
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Ready when: all cavities are filled evenly and level
Tip: Use a liquid measuring cup with a pouring spout for easier filling and less dripping.
Insert Sticks (If Needed)
- If your molds have removable sticks or lids, insert them according to the mold's instructions.
- Some molds include built-in stick holders that secure the stick once inserted; push sticks straight down into the center of each cavity until they reach the bottom or are snug.
- If your mold has plastic stick holders that lock in place, slide them closed over the top.
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Ready when: all sticks are vertical and secure
Tip: Insert sticks after 1–2 hours of freezing if your mold design requires it; this prevents sticks from floating or tilting as the mixture sets.
Freeze Until Solid
- Place the filled molds in the freezer on a level shelf.
- Freeze for at least 6 hours, or until the popsicles are completely solid and feel hard when you gently press the top with your finger.
- Overnight (8 hours) is ideal for a fully firm texture.
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Ready when: popsicles are completely hard and solid to the touch
Tip: Freezer temperature should be 0°F (−18°C) or colder. If your freezer runs warmer, add 1–2 hours to the freezing time.
Unmold and Serve
- Run warm water over the outside of the mold for 15–30 seconds to slightly soften the outer layer of each popsicle, making them easier to remove.
- Gently pull or twist each popsicle by the stick until it slides out of the cavity.
- If a popsicle resists, hold the mold under warm water a few seconds longer.
- Serve immediately, or return unmolded popsicles to the freezer in an airtight container for storage.
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Ready when: popsicles slide smoothly from the mold cavities
Tip: Do not use hot water, which will melt the popsicles too quickly or unevenly. Lukewarm water (around 100°F / 38°C) works best.
Good to know
Tips
- Do not skip the salt—it brightens the vanilla and rum notes and prevents the custard from tasting one-dimensionally sweet.
- For a richer custard, replace half the water with whole milk or an additional 2 tablespoons of heavy cream.
- If rum extract flavor is too subtle after tasting the unfrozen mixture, add another 0.25 teaspoon, but avoid exceeding 1 teaspoon total, which can become harsh when frozen.
- These popsicles are best enjoyed within 1 week of freezing for peak flavor and texture; after that, freezer burn can dull the delicate vanilla and rum notes.
Make ahead
Popsicles can be made up to 2 weeks ahead and stored frozen in an airtight container, separated by parchment paper.
Storage & reheating
Room temperature: not applicable (frozen dessert). Freezer: up to 2 weeks in an airtight container with parchment or plastic wrap between each popsicle to prevent sticking. To serve, let sit at room temperature for 2–3 minutes to slightly soften, or enjoy directly from the freezer for a harder bite.
Substitutions
- heavy cream → full-fat coconut milk (canned, unsweetened). Use the same amount. The popsicles will have a subtle coconut flavor and slightly different texture, but will still freeze smoothly.
- rum extract → bourbon extract or brandy extract. Use the same 0.5 teaspoon. Bourbon brings a deeper, spicier note; brandy adds warmth. Adjust to taste.
- vanilla extract → 1 split vanilla bean, seeds scraped and pod steeped in the cream for 30 minutes before straining. Omit the extract and infuse the cream with fresh vanilla for a more complex, less artificial vanilla flavor.
- water → whole milk or 2% milk. Use the same 0.25 cup. Milk will add a creamier mouthfeel and slight dairy tang. Omit salt if using milk.
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