Prepare dye baths: In small bowls or cups, mix 1/4 cup of water with a few drops of food coloring. For more vibrant colors, use gel coloring or increase the amount. Add 1/2 teaspoon of vinegar or lemon juice if desired.

Dip the marshmallows: Using tongs or a toothpick, quickly dip the marshmallows into the dye bath. For lighter shades, dip briefly; for bolder colors, let them soak for a few extra seconds.

Dry the marshmallows: Place the dyed marshmallows on paper towels or parchment paper. Let them dry completely for 1–2 hours.

Optional designs: Use food-safe markers or brushes dipped in dye to add polka dots, stripes, or patterns once marshmallows are dry.

Serve or display: Use them in hot cocoa, on cupcakes, in treat bags, or as festive Easter basket fillers.