1. Prepare Your Muffin Tin: Line a 12-cup muffin tin with paper liners. This step is crucial for easy removal of the frozen cups later on. If you don’t have paper liners, you can lightly grease the muffin tin cups, but liners make the process much smoother.

2. Combine Yogurt and Sweetener: In a medium-sized mixing bowl, combine the plain Greek yogurt, maple syrup (or honey), and vanilla extract. Stir well with a spoon or whisk until all ingredients are thoroughly combined and the mixture is smooth.

3. Melt the Peanut Butter: In a separate microwave-safe bowl, microwave the creamy peanut butter for about 30-45 seconds, or until it’s slightly melted and easily stirrable. This makes it much easier to incorporate into the yogurt mixture. If you don’t have a microwave, you can gently melt it in a small saucepan over low heat.

4. Fold in Peanut Butter: Add the melted peanut butter to the Greek yogurt mixture. Stir gently until the peanut butter is just combined. Avoid overmixing; a few streaks of peanut butter throughout the yogurt create a lovely marbled effect and ensure the peanut butter flavor is distributed. If using a pinch of sea salt, add it now.

5. Portion into Muffin Cups: Evenly divide the Greek yogurt mixture among the 12 prepared muffin cups. You can use a spoon or a small ice cream scoop for this. Fill each cup about two-thirds full to leave room for any optional toppings.

6. Add Optional Toppings: If desired, sprinkle the mini chocolate chips over the top of each yogurt cup. You can also add a small drizzle of extra peanut butter, a sprinkle of chopped nuts, or a few berries for added flavor and texture.

7. Freeze Until Firm: Carefully transfer the muffin tin to the freezer. Freeze for at least 2-3 hours, or until the yogurt cups are completely firm. The freezing time may vary depending on your freezer’s temperature.

8. Serve and Enjoy: Once frozen solid, remove the cups from the muffin tin. Peel off the paper liners and serve immediately. If they are too hard, let them sit at room temperature for a minute or two to soften slightly before eating.