Line a 9x13 baking sheet with parchment paper, letting edges hang over two sides. This prevents sticking and lets you lift the finished bark straight off—I learned this the hard way after chipping frozen yogurt off sheet pan corners for way too long.
Whisk together 2 cups Greek yogurt and 1/4 cup honey until smooth, about 1 minute. Spread evenly across the prepared pan, smoothing the top with a rubber spatula. This base layer needs to be roughly 1/4 inch thick because thinner layers crack during freezing.
Combine 1/2 cup graham cracker crumbs with 2 tablespoons melted butter, stirring until the texture resembles wet sand. Sprinkle evenly over the yogurt base—this is the moment most people skip, and it changes everything about your final result because you're adding structure. Let this layer set for 10 minutes in the freezer before moving forward.
Toss 1/2 cup diced strawberries, 1/2 cup blueberries, and 1/4 cup blackberries together gently. Arrange them in a flag pattern across the top—red berries on one side, blue on the other, with white space between if you're feeling traditional. I've learned that pressing berries too firmly into the yogurt causes them to sink as everything freezes, so treat them like they're delicate.
Sprinkle 1/4 cup chopped pistachios, 1/4 cup toasted coconut flakes, and 1 tablespoon lemon zest across the surface. The lemon zest brightens the flavor without adding moisture that would compromise your 4th of july frozen yogurt bark crowd texture during the long freeze.
Dust 2 tablespoons powdered sugar evenly across everything—it adds visual appeal and a subtle sweetness boost. Cover loosely with plastic wrap to prevent freezer burn, then freeze for 4 hours minimum or up to 48 hours.
Remove from freezer 5 minutes before serving to soften slightly. Using the parchment overhang, lift the bark onto a cutting board. Cut into 12 squares using a sharp knife dipped in hot water between cuts—this prevents the bark from shattering because the knife glides through rather than cracking the structure.
