Step 1: Create the Cookie Dough Base In a large bowl, combine the peanut butter, Greek yogurt, maple syrup (or honey), and vanilla extract. Mix everything until completely smooth and creamy—this takes about 2 minutes of vigorous stirring, but it's crucial for achieving the perfect cookie texture.

Step 2: Add Dry Ingredients Gradually add the oat flour and pinch of salt to the wet mixture. Stir until a soft, moldable dough forms. The dough should hold together when pressed but not be sticky. If it seems too wet, add a bit more oat flour; if too dry, add a teaspoon more Greek yogurt.

Step 3: Shape the Cookies Roll the dough into small balls (about 1 tablespoon each), then flatten them into cookie shapes using your palm or the bottom of a glass. Place them on a parchment-lined baking sheet or plate. These Healthy No-Bake Peanut Butter Yogurt Sandwich Cookies should be uniform in size for the best sandwich results.

Step 4: First Chill Refrigerate the shaped cookies for at least 30 minutes until they're firm and hold their shape well. This chilling step is essential—without it, your cookies will be too soft to handle and sandwich properly.

Step 5: Make the Filling While the cookies chill, prepare the filling by mixing Greek yogurt, peanut butter, and honey until smooth and creamy. The filling should be thick enough to spread but not so thick that it squishes out when you sandwich the cookies together.

Step 6: Assemble and Final Chill Spread a generous spoonful of filling on the flat side of half the cookies, then top with the remaining cookies to create sandwiches. Press gently to spread the filling to the edges. Chill the assembled Healthy No-Bake Peanut Butter Yogurt Sandwich Cookies for another 30-60 minutes until completely set.