Combine all ingredients into small bowl until smooth.

Refrigerate until needed.

Preheat oven to 325 degrees F. Line cookie sheet with parchment paper or non-stick baking mat.

In medium bowl, combine all ingredients. Mix well.

Wrap dough in plastic wrap and rest for 5 minutes.

Roll dough out into 1/4-in. thickness.

Using cookie cutter, cut shapes and place on lined cookie sheet.

Bake for 25-30 minutes or until they look dry. For softer treats, bake for less time.

Transfer onto wire rack and let cool completely.

Once cooled, make sandwiches with yogurt filling.