Preheat oven to 400 degrees. Line baking sheet with parchment paper.
Cut puff pastry into (12) 4"x3" rectangles. Place on lined baking sheet and bake for 9-10 minutes or until golden.
Remove to a wire rack and let cool.
Whisk together milk, creamer and Greek yogurt until smooth.
Whisk in pudding mix until smooth. (I used my stand mixer.)
Let set up in refrigerator for 5-10 minutes. Transfer to a ziploc bag.
Split each pastry in half.
Cut tip off of pudding bag and pipe pudding onto the bottom half of each pastry.
Top with sliced strawberries.
Place top half of each pastry on top of the strawberries.
Stir toppings until nice and smooth, heating and cooling if necessary.
Use a fork or spoon to drizzle on top of each napoleon.
Dust with powdered sugar if desired.