Grab 8 small freezer-safe cups or silicone molds—I use 4-ounce ramekins. Pour a thin layer of plain Greek yogurt into the bottom of each cup, about 1/4 inch thick. Freeze for 30 minutes so you've got a solid base. This prevents all your toppings from sinking to the bottom, which I learned the hard way after my first batch became a swirled mess.
While that's freezing, combine the diced strawberries, 1/2 cup low-fat milk, 1/4 cup honey, 2 tablespoons lemon juice, 1 teaspoon vanilla bean powder, and 1 pinch salt in a blender. Blend until smooth but still slightly textured—you want it creamy, not completely liquified. Taste it and adjust honey if your berries weren't super sweet.
Pull your cups from the freezer once that base layer is solid and frosty. Pour the strawberry mixture on top, filling each cup about three-quarters full. Leave a little room at the top for the crumble layer. Freeze for another hour until mostly firm but not rock-hard.
Mix together 1/4 cup graham cracker crumbs, 2 tablespoons toasted coconut, 1 tablespoon chopped pistachios, and 1/4 teaspoon ground cardamom in a small bowl. Drizzle 1/4 teaspoon melted butter over the mixture and stir until every crumb is lightly coated. The butter helps everything stick together and get crispy.
Remove the cups from the freezer and sprinkle the toasted crumb mixture evenly over each one. Press it down gently so it adheres to the frozen yogurt layer below. This step is important—loose crumbs slide off, trust me. Freeze for at least 2 more hours until everything is completely solid.
Before serving, run warm water on the outside of each cup for about 10 seconds if you're using regular ramekins. This loosens the strawberry frozen yogurt cups enough to pop out cleanly. If you're using silicone molds, just squeeze gently and they'll slip right out. Let them sit at room temperature for 2-3 minutes for the best texture.
Enjoy immediately or store them in an airtight container in the freezer for up to two weeks. I've noticed mine actually taste creamier on day two—the flavors meld together and it becomes even more luxurious.