Toasted Marshmallow Syrup Recipe

Recipe by Soukayna

0.0 from 0 votes

Course: DessertCuisine: AmericanDifficulty: Easy

Servings

–

servings

Prep time

minutes

Cooking time

minutes

Calories

kcal

Toasted marshmallow syrup is a sweet, smoky syrup made by toasting marshmallows and dissolving them in sugar water. The recipe takes 20 minutes, makes 2 cups, and the key technique is toasting the marshmallows under the broiler until deep golden brown.

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Ingredients

4 cups marshmallows
1 cup granulated sugar
1 cup water
1 teaspoon vanilla extract
0.125 teaspoon salt

Directions

Preheat the broiler and position the oven rack 4 to 5 inches from the heating element. Line a baking sheet with parchment paper.
Arrange the marshmallows in a single layer on the prepared baking sheet. Broil for 2 to 3 minutes until the tops are deep golden brown with some charred spots. Watch constantly to prevent burning.
Transfer the toasted marshmallows to a medium saucepan. Add the sugar and water.
Heat over medium heat, whisking constantly, for 5 to 7 minutes. Stop when the marshmallows dissolve completely and no white streaks remain.
Remove from heat and stir in the vanilla extract and salt. Mix until combined.
Strain the syrup through a fine mesh strainer into a bowl or jar. Press gently with a spoon to push all the liquid through. Discard any solids.

Notes

Toasting the marshmallows to deep golden brown in 2 to 3 minutes under the broiler creates the signature caramelized flavor that plain marshmallows cannot provide.
If the syrup tastes burnt, the marshmallows stayed under the broiler too long. Dilute with 2 tablespoons of water and add 1 teaspoon of vanilla extract to balance the bitterness.
The syrup keeps for 2 weeks in an airtight jar in the refrigerator. Mini marshmallows work just as well and toast 1 minute faster than regular size.

Nutrition Facts

Serving Size: 1 g
Total number of serves: 16
Calories: 80kcal
Fat: 0g
Carbohydrates: 20g
Fiber: 0g
Protein: 0g

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This marshmallow syrup recipe delivers the best results when you watch the broiler closely and strain the finished syrup. The sections below cover ingredient swaps, toasting tips, and fixes for common texture problems.

Key Ingredients and Substitutions

Each ingredient in syrup affects the final flavor and texture.

Marshmallows: Standard white marshmallows provide the base flavor and gelatin that helps the syrup thicken slightly. Mini marshmallows work just as well and toast faster, but jumbo marshmallows need an extra minute under the broiler.
Granulated sugar: White sugar dissolves cleanly and lets the toasted marshmallow flavor come through. Brown sugar adds molasses notes that can overpower the delicate smokiness.
Vanilla extract: Pure vanilla amplifies the marshmallow flavor. Imitation vanilla works but tastes slightly artificial. Skip it entirely if you want only the toasted sugar flavor.
Salt: A pinch of salt balances the sweetness and makes the caramelized notes more pronounced. Without it the syrup tastes one dimensional.

How to Get Toasted Marshmallow Syrup Right

Marshmallow syrup succeeds when you control the toasting and dissolving steps.

Toast on the top rack: Position the baking sheet 4 to 5 inches from the broiler element. This distance toasts the marshmallows in 2 to 3 minutes without burning them. Farther away and they melt without browning.
Watch constantly: Marshmallows go from golden to burnt in seconds. Pull the pan when the tops are deep brown with some black spots. Pale marshmallows produce a syrup that tastes like plain sugar water.
Stir while heating: Whisk the marshmallow mixture over medium heat for 5 to 7 minutes until the marshmallows dissolve completely. Stop when no white streaks remain. Undissolved marshmallow leaves gummy bits in the finished syrup.
Strain immediately: Pour the hot syrup through a fine mesh strainer right after cooking. The syrup flows easily when hot. If it cools first it thickens and clogs the strainer.
Cool before bottling: Let the syrup reach room temperature before transferring it to a jar. Hot syrup creates condensation that dilutes the flavor and shortens shelf life.

What Went Wrong

Why Is the Syrup Too Thin?

Thin syrup comes from too much water or not enough cooking time. The marshmallows need 5 to 7 minutes of simmering to release their gelatin and thicken the liquid. If your syrup is still thin after straining, return it to the pan and simmer for 3 more minutes. It will thicken as it cools.

Why Does It Taste Burnt?

A burnt flavor means the marshmallows stayed under the broiler too long. The goal is deep golden brown with a few charred spots, not black all over. Pull the pan at the first sign of heavy charring. If the syrup already tastes burnt, dilute it with 2 tablespoons of water and add 1 teaspoon of vanilla extract to mask the bitterness.

Why Are There Gummy Bits?

Gummy bits are undissolved marshmallow pieces that escaped the strainer. This happens when the marshmallows did not cook long enough or the strainer mesh was too coarse. Strain the syrup a second time through cheesecloth or a coffee filter. Next time, stir the mixture for the full 7 minutes and use a fine mesh strainer.

Ways to Change Toasted Marshmallow Syrup Recipe

Chocolate Toasted Marshmallow Syrup

Add 2 tablespoons of unsweetened cocoa powder to the sugar and water before heating. Whisk constantly to prevent lumps. The syrup will taste like hot chocolate with toasted marshmallow notes.

Cinnamon Toasted Marshmallow Syrup

Stir in 1 teaspoon of ground cinnamon with the vanilla extract. The spice adds warmth without covering the caramelized flavor. Use this version in fall coffee drinks.

Salted Caramel Toasted Marshmallow Syrup

Increase the salt to 1/4 teaspoon and add 1 tablespoon of butter during the final minute of cooking. The extra salt and fat mimic salted caramel sauce. This version is thicker and richer.

What to Serve With Toasted Marshmallow Syrup

Toasted marshmallow syrup works in coffee, hot chocolate, milkshakes, and cocktails. Drizzle it over pancakes, waffles, or ice cream. It pairs well with chocolate desserts and complements the spices in pumpkin coffee syrup when you want a layered fall drink.

How to Store Toasted Marshmallow Syrup

Toasted marshmallow syrup keeps for 2 weeks in an airtight container or jar in the refrigerator. The syrup thickens when cold. Let it sit at room temperature for 10 minutes before using, or warm it gently in the microwave for 15 seconds. The syrup does not freeze well because the gelatin from the marshmallows separates when thawed. Make small batches and use them within 2 weeks for the best flavor.

Toasted Marshmallow Syrup FAQs

Can you make toasted marshmallow syrup without a broiler?

Yes. Toast the marshmallows in a dry skillet over medium heat for 3 to 4 minutes, turning them with tongs until all sides are golden brown. The syrup will have the same caramelized flavor.

Does toasted marshmallow syrup need to be refrigerated?

Yes. The syrup contains gelatin from the marshmallows and has a high water content, so it needs refrigeration. It lasts 2 weeks in an airtight container in the refrigerator.

What does toasted marshmallow syrup taste like?

Toasted marshmallow syrup tastes like caramelized sugar with smoky vanilla notes. It has the sweetness of simple syrup with the deeper, slightly burnt flavor of a toasted marshmallow. The taste is richer and more complex than plain marshmallow.

Can you use flavored marshmallows?

Yes. Flavored marshmallows like vanilla, strawberry, or chocolate add their own flavor to the syrup. The toasted flavor will still come through. Use the same amount and toasting time as regular marshmallows.

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