In a medium bowl, combine the plain yogurt, honey, and vanilla extract. Stir until the mixture is smooth and the honey is fully incorporated.
Warm the fig jam slightly in the microwave (about 15-20 seconds) or on the stove to make it easier to swirl. It should be warm but not hot.
Start by spooning a bit of the yogurt mixture into each popsicle mold. Add a spoonful of the warmed fig jam on top. Use a skewer or butter knife to gently swirl the jam into the yogurt, creating a marbled effect. Repeat until molds are filled, leaving space at the top.
If using mixed berries, sprinkle a few into each mold, pushing them slightly into the mixture.
Place the popsicle sticks into the molds. If molds don’t have a built-in stick holder, freeze for 30-40 minutes until edges are firm, then insert sticks. Freeze for at least 4-6 hours or overnight until fully frozen.
To unmold, briefly run warm water over the outside of the molds. Gently pull the popsicles out and enjoy immediately or store in an airtight container in the freezer.