First Step: Prepare Your Baking Equipment and Ingredients
Preheat your oven to 400°F (200°C). Lightly grease a 9-cup muffin tin with cooking spray or olive oil to prevent sticking and to help the puffs bake evenly. Thaw your sheet of puff pastry completely according to package instructions so it’s pliable and ready to use.

Second Step: Cook and Prepare the Bacon
If you are using thick-cut bacon strips, bake or pan-fry them until crisp. Allow them to cool before crumbling into bite-sized pieces. Alternatively, bacon bits can be used for convenience. This smoky element adds a savory punch to your spinach puffs.

Third Step: Prepare the Creamy Filling Base
Microwave the cream cheese in 10-second intervals until softened but not hot. Stir in the large egg, olive oil, and dried dill (if using) until the mixture is fully combined and smooth. This creates a rich, creamy base that ties the filling ingredients together beautifully.

Fourth Step: Mix the Filling Ingredients
In a separate bowl, combine the chopped fresh spinach (or well-drained frozen), crumbled feta cheese, bacon bits, and season with salt and pepper to taste. Pour the cream cheese mixture over this and mix thoroughly using a fork. The result should be a uniform, flavorful filling mixture ready to be spooned into the puff pastry.

Fifth Step: Prepare Puff Pastry Cups
Roll out the thawed sheet of puff pastry on a lightly floured surface. Cut it into 9 equal squares, roughly 3×3 inches each. Gently press each square into the muffin tin cups, allowing the corners to overhang slightly. This will help create a beautiful, puffed edge as the puffs bake.

Sixth Step: Fill and Seal the Puffs
Divide the filling evenly, placing about a heaping tablespoon of the spinach mixture into each puff pastry cup. Next, bring the four corners of each pastry square together over the filling and press gently to seal the puff. This step ensures the filling stays inside during baking while creating an attractive package.

Seventh Step: Brush and Bake
Brush the tops of each puff with melted butter or olive oil for a golden, shiny finish. An egg wash can also be used here if you prefer more gloss. Place the muffin tin in the oven and bake for approximately 20 minutes or until the puff pastry is puffed and golden brown.

Final Step: Cool and Serve
Remove the muffin pan from the oven and let the spinach puffs cool for 10 minutes. Use a knife to gently loosen each puff from the pan edges before removing. Serve warm or at room temperature as a crowd-pleasing appetizer or snack. The filling can also be made ahead and refrigerated, while cooked puffs freeze well for later enjoyment.