These are homemade marshmallows made with real vanilla bean paste — soft, springy, and nothing like the bag you’d grab at the grocery store. The process takes about 50 minutes and uses a candy thermometer and a stand mixer, so there’s no guesswork once you know what to watch for. If you’ve ever wanted to make a from-scratch confection that genuinely impresses people, this is a good place to start.
Why this recipe works
Two things make this recipe reliable. First, cooking the sugar syrup to exactly 240°F (soft-ball stage) before it hits the gelatin is what gives the marshmallows their structure — too low and they’ll be sticky and won’t set, too high and they’ll be stiff and grainy. A clip-on candy thermometer removes the guesswork entirely. Second, pouring the hot syrup slowly into the mixer while it runs on low prevents the gelatin from seizing up or cooking unevenly. Once you switch to high speed and whip for 10 to 12 minutes, the mixture triples in volume and turns glossy — that’s how you know it’s ready to pour.
About the ingredients
- Vanilla bean paste: This is the ingredient worth seeking out. It gives you real vanilla flavor and the characteristic black specks without having to split and scrape a whole bean. Find it near extracts at most grocery stores or online. Pure vanilla extract works as a substitute but the flavor will be lighter.
- Light corn syrup: This isn’t just sweetener — it prevents the sugar from crystallizing as it cooks, which keeps your marshmallows smooth. Glucose syrup is a direct swap if you have it. Don’t skip it or substitute honey; honey changes the flavor and behaves differently at high heat.
- Unflavored gelatin: The recipe uses three standard 0.25 oz envelopes. Bloom time matters — give it the full 10 minutes in cold water before the syrup is ready.
- Cornstarch and confectioners’ sugar coating: Skip the garnish — not worth the extra dish. The 50/50 coating mix is functional: it keeps the marshmallows from sticking together and is the only finish you need.
What can go wrong
- Marshmallows won’t set after cooling: The syrup likely didn’t reach 240°F, or the gelatin wasn’t fully bloomed. Always verify your thermometer is accurate by testing it in boiling water first — it should read 212°F at sea level.
- Mixture stays liquid and won’t whip up: This usually means the syrup was poured in too fast and partially cooked the gelatin. Pour in a slow, steady stream down the side of the bowl with the mixer running on low.
- Marshmallows are grainy or crystallized: Stirring the syrup after it comes to a boil causes sugar crystals to form. Once the sugar dissolves and the liquid is boiling, leave it alone until it hits temperature.
- Mixture sets in the bowl before you can spread it: Marshmallow sets quickly once whipping is done. Have your prepared pan right next to the mixer before you start, and work fast with an oiled spatula the moment whipping is complete.
- Marshmallows stick together after cutting: They need a thorough coat of the confectioners’ sugar and cornstarch mix on all cut sides, not just the top and bottom. Toss the cut pieces in the coating and shake off the excess.
Leftovers and make-ahead
Homemade marshmallows keep well at room temperature for up to 2 weeks stored in an airtight container — make sure every surface is coated in the sugar-cornstarch mix to prevent sticking. Don’t refrigerate them; the humidity causes them to get sticky and weep. They can be frozen for up to 3 months in a zip-top bag with extra coating; thaw at room temperature for about 30 minutes before serving. These are a great make-ahead treat for gifting or holiday baking since they actually improve in texture after the first 24 hours once fully set.
Vanilla Bean Marshmallows
Equipment
- Stand mixer with whisk attachment
- Candy thermometer
- Medium saucepan
- 8x8-inch baking pan
- Offset spatula or silicone spatula
- Fine-mesh sieve
Ingredients
For the Marshmallow Base:
- 3 envelopes unflavored gelatin each envelope is about 0.25 oz (total of 0.75 oz)
- ½ cup cold water for blooming the gelatin
- 2 cups granulated sugar preferably organic cane sugar for best flavor
- ⅔ cup light corn syrup or substitute glucose syrup
- ¼ teaspoon kosher salt
- ½ cup water for the sugar syrup
- 1 tablespoon pure vanilla bean paste or high-quality vanilla extract
For Finishing & Coating:
- ½ cup confectioners' sugar for dusting the pan and coating marshmallows
- ½ cup cornstarch for blending with sugar for coating
Instructions
- Lightly grease an 8x8-inch baking pan with neutral oil and line it with parchment paper. Lightly dust with a mix of confectioners’ sugar and cornstarch (about 2 tablespoons of the blend). Set aside.
- In the bowl of a stand mixer fitted with the whisk, sprinkle the gelatin over 1/2 cup of cold water. Let it bloom for at least 10 minutes while you prepare the syrup.
- In a medium saucepan, combine granulated sugar, corn syrup, salt, and remaining 1/2 cup water. Heat over medium-high. Stir gently until the sugar dissolves, then stop stirring. Clip a candy thermometer to the pot and boil until the syrup reaches exactly 240°F (115°C), the soft-ball stage. This takes about 10 minutes.
- Once the syrup hits 240°F (115°C), immediately remove it from heat. Slowly pour it into the bloomed gelatin mixture while the mixer runs on low speed, being cautious as the syrup is extremely hot.
- Increase the mixer to high speed and whip the mixture for 10-12 minutes, until it triples in volume and forms glossy, fluffy peaks. When it starts to cool and thicken, add the vanilla bean paste and whip to incorporate.
- Quickly pour the marshmallow into the prepared pan, spreading with an oiled spatula or offset knife. Smooth the top evenly. Let it sit uncovered at room temperature for at least 6 hours, or overnight for best texture.
- In a bowl, mix the powdered sugar and cornstarch. Dust a cutting board with the blend, turn the marshmallows out of the pan, and peel off parchment. Use a greased, sharp knife or pizza cutter to slice into squares. Toss each marshmallow in the coating mixture to prevent sticking.
Notes
- To add depth, infuse the water for the syrup with a split vanilla pod beforehand, then strain before boiling.
- For colored marshmallows, add a drop or two of food coloring during the whipping stage.
- For fruit-flavored versions, replace some water with puréed fruit reduction. Note: sugar temperature may need adjusting depending on liquid content.
- To make vegan, substitute gelatin with agar agar powder, adjusting bloom method per brand instructions.
Nutrition
Frequently asked questions
Do I really need a stand mixer, or can I use a hand mixer?
A hand mixer will work, but it’s harder to manage. You’ll need to pour the hot syrup in with one hand while holding the mixer with the other — the syrup is extremely hot, so be careful. A stand mixer is safer and easier because both hands are free during that step.
How do I know when the marshmallow is done whipping?
The mixture is ready when it’s thick, glossy, and holds a stiff peak when you lift the whisk — similar to stiff meringue. It should also feel warm but not hot to the touch, which typically happens around the 10 to 12 minute mark on high speed.
Can I make these without a candy thermometer?
It’s not recommended for a first attempt. The difference between 235°F and 245°F changes the texture significantly, and it’s hard to judge by eye alone. A basic candy thermometer costs just a few dollars and makes the whole process straightforward.
What to cook next
- Silky Dark Chocolate Mousse
- Classic Soft Sugar Cookies
- Melt-in-Your-Mouth Scottish Shortbread Cookies
- Sunshine in a Jar: Classic British Lemon Curd
