This batch of vegan marshmallows became a turning point in my plant-based kitchen. I first developed this version during a late summer camping weekend when a friend brought along vegan chocolate but no marshmallows. I was determined to produce something that would toast, hold up in a s'more, and melt into hot cocoa. The peat-scented protein powders that I had tried previously left a grainy mouthfeel, but this formula, which balances pea protein with a hot sugar and agar syrup, yields a soft, shiny, and surprisingly faithful texture to the classic confection. The result is light and pillowy with a clean sweetness and a subtle savory backbone from the pea isolate.

What makes these particularly special is the way they behave when properly whipped: glossy peaks that hold their shape, a surface that browns evenly when toasted, and a mouthfeel that dissolves rather than clings. I learned early that temperature and timing are everything here. A reliable candy thermometer and an electric mixer with a robust whisk attachment will save you from afternoon of frustration. When served warm on a graham cracker with dairy-free chocolate, they bring the same nostalgic smile as any traditional s'more — only kinder to animals and just as indulgent.

Ingredients

• Tapioca flour or corn starch: 2 tablespoons for coating. Use tapioca for a slightly chewier finish; store-bought Bob's Red Mill tapioca starch works well. This creates a nonstick exterior so squares separate easily.
• Powdered sugar: 2 tablespoons to mix with the starch for dusting. Confectioners sugar adds a sweet barrier and prevents stickiness.
• Pea protein powder (90%+ isolate): 5 tablespoons. Choose a neutral-flavored pea isolate — a finely milled powder blends more smoothly and supports the whipped structure without tasting overly beany.
• Baking powder: 2 teaspoons. This small amount helps with lightness in the whipped mixture and offsets any density from the protein powder.
• Xanthan gum: 1/4 teaspoon. A tiny amount stabilizes the protein foam so peaks hold while the sugar syrup cools and sets.
• Cold water: 3/4 cup for hydrating the protein and creating a stable whipped meringue-like base.
• Granulated sugar: 2 cups for the sugar syrup. Use standard white sugar for reliable caramelization properties.
• Agar powder (not flakes): 1 tablespoon. Agar powder dissolves cleanly into the syrup and gels as it cools, providing the plant-based structure that replaces gelatin.
• Water for syrup: 1 cup. This pairs with the sugar and agar to form a thick, clear syrup at 225-227°F.
• Nonstick spray or neutral oil: For preparing an 8x8 inch baking pan so the marshmallow releases cleanly.

Instructions

Prep the pan and dusting: In a small bowl combine 2 tablespoons confectioners sugar and 2 tablespoons tapioca flour. Lightly spray an 8x8 inch pan and coat it completely with the powdered mixture, tapping out excess. Reserve the remaining powder for coating finished pieces. The dusting prevents sticking and gives the marshmallows a familiar matte finish. Whip the pea protein base: In the bowl of a stand mixer fitted with the whisk, combine 5 tablespoons pea protein, 2 teaspoons baking powder, and 1/4 teaspoon xanthan gum. Add 3/4 cup cold water and whisk at high speed for about 10 minutes. The mixture should thicken and form glossy, stiff peaks similar to a firm meringue. Insufficient whipping will lead to marshmallows that do not set properly. Cook the sugar and agar syrup: In a heavy-bottomed saucepan combine 2 cups granulated sugar and 1 tablespoon agar powder, then add 1 cup water and stir to dissolve. Bring to a boil over medium-high heat, attach a candy thermometer, and continue heating until the syrup reaches 225-227°F. Stirring occasionally prevents scorching. At 210°F the mixture boils steadily; at 225-227°F it becomes thick and syrupy yet still clear. Remove from heat immediately to avoid darkening. Combine syrup with whipped base: With the mixer running on high, carefully and quickly pour the hot sugar syrup into the whipped pea protein mixture. Work steadily and use a splatter shield or a towel draped over the mixer to avoid hot sugar splashes. Continue mixing on high speed for 10 minutes, scraping the sides and bottom once halfway through. The final mixture should be shiny, thick, and hold firm peaks. Set and cut: Immediately transfer the marshmallow mass to the prepared pan using a rubber spatula. Smooth to the edges quickly with an offset spatula or lightly oiled knife. Refrigerate for 1 hour to set. Turn onto a board dusted with the reserved powdered mixture, cut into desired squares, and toss each piece gently in the dusting blend to prevent stickiness.

Storage Tips

These keep best short-term. Store finished marshmallows in an airtight container at room temperature for up to 24 hours; beyond that they will start to become sticky or slightly chewy. If refrigerating, place them in a single layer separated by parchment and use within 48 hours. For longer storage, freeze sealed pieces for up to one month; thaw at room temperature and recoat lightly in the powdered starch and sugar blend before use. Avoid humid environments; moisture will aggressively degrade texture.

Ingredient Substitutions

This formula is purposely exacting. Do not swap the agar powder for flakes at a 1:1 measurement, as flakes do not dissolve as readily and will result in grainy texture. Do not replace the granulated sugar with alternative sweeteners; liquid or sugar-alcohol substitutes will not reach the syrup consistency needed. If you cannot source pea protein isolate, a different neutral plant protein with very high isolate content might work, but expect variations in flavor and whipping behavior.

Serving Suggestions

Serve toasted over a dairy-free chocolate square sandwiched between graham-style cookies for classic s'mores, or drop a couple into a steaming mug of hot cocoa for an indulgent finish. Cut smaller cubes and use within rice crisp treats, or skewer on a stick and lightly torch the surface for a caramelized crust. Garnish with grated citrus zest or a dusting of cinnamon for holiday variations.

Cultural Background

Traditional marshmallows are rooted in ancient preparations using the marshmallow plant, but modern versions rely on gelatin. This plant-based adaptation replaces animal gelatin with agar, a seaweed-derived gelling agent long used in East Asian cuisine and in laboratory settings. The pairing of agar with whipped pea protein is a contemporary technique that recreates the elasticity and aeration of classic confections using entirely vegan-friendly components.

Seasonal Adaptations

In winter, fold in a teaspoon of vanilla bean powder and a pinch of cinnamon for a warm, cozy note. In summer try adding 1 teaspoon of lime zest and a splash of coconut extract before the final whip for a tropical lift. For holiday parties, gently fold in finely crushed peppermint candies at the end and press a few onto the tops for festive color.

Meal Prep Tips

Plan the timeline: the only active tasks are whipping and cooking the syrup, which together take about 30 minutes. Chill for an hour and cut just before serving. If preparing for an event, make the components — measure the dry powders, dust the pan, and have the thermometer and mixer ready — so assembly is swift. Use an 8x8 pan for an even slab; scale to a 9x13 if serving a crowd but increase chilling time slightly.

Success Stories

Readers have told me these marshmallows inspired them to make vegan s'mores for the first time and pass them out at neighborhood bonfires. One friend brought them to a church bake sale and sold out within an hour. My child took a piece to school as a snack and reported back that classmates asked for the recipe. Those moments — watching skeptical eaters smile in surprise — are what make refining this formula so rewarding.

Make the batch, gather people you love, and enjoy the small, sweet ritual of toasted sugar and shared smiles. These marshmallows are more than a treat; they are a way to make plant-based gatherings feel familiar and indulgent.