Preheat your oven to 250°F and line two large baking sheets with parchment paper. Brush the parchment lightly with corn syrup and butter—this prevents sticking and creates that signature glossy finish on the bottom. The mixture should feel tacky but not wet when you touch it.

Pour 4 large egg whites into a clean glass bowl with 1/4 teaspoon cream of tartar and 1/4 teaspoon salt. Beat on medium speed for about 2 minutes until soft peaks form—you'll see it get foamy and white. The texture should look like fluffy clouds when you pull the beater up.

Gradually add 1 cup granulated sugar, one tablespoon at a time, while beating on medium-high speed. This takes about 5-7 minutes total, but don't rush it or your meringue won't reach stiff peaks. Keep beating until the mixture looks glossy, thick, and forms sharp peaks when you lift the beater.

Add 1 teaspoon vanilla extract and beat for 30 seconds until combined. Divide your meringue into three bowls—one stays white, one gets 1/2 teaspoon red gel coloring, and one gets 1/2 teaspoon blue. Gently fold the color into each bowl with just a few strokes (don't overmix or you'll lose the volume).

Transfer each colored meringue to a piping bag fitted with a star tip. Pipe little kiss-shaped mounds onto your prepared baking sheets, spacing them about 1 inch apart. I alternate colors as I go to create that patriotic pattern, which makes them extra festive.

Bake for 90 minutes at 250°F until the meringue kisses are firm and crispy on the outside. They'll stay slightly soft inside, which is exactly what you want—never let them get completely hard or they'll shatter. The edges should just barely start turning golden when they're done.

Turn off the oven and crack the door open about 2 inches to let them cool slowly for 15 minutes. This gentle cooling prevents cracking, which saved my batch when I nearly panicked about the surface texture. Transfer to a wire rack and cool completely before storing.