Preheat your oven to 350°F (175°C). Lightly grease a muffin pan with butter or non-stick spray. This helps the baklava bites release easily after baking.

Place pistachios, walnuts, sugar, cinnamon, and cardamom into a food processor. Pulse until finely chopped but not powdered. The filling should still have a little texture.

Lay one sheet of phyllo pastry on a clean surface. Brush it lightly with melted butter. Repeat with three more sheets to create sturdy, flaky layers.

Cut the layered phyllo into equal squares. Press each square gently into the muffin pan cups, creating small pastry shells with slightly folded edges.

Spoon the pistachio mixture evenly into every pastry cup. Press gently so the filling stays in place without crushing the delicate pastry layers.

Bake the baklava bites for about 18 to 20 minutes. The pastry should become golden brown, crisp, and beautifully flaky around the edges.

While the pastries bake, combine honey, sugar, water, lemon juice, vanilla, and lemon peel in a saucepan. Simmer for about five minutes until slightly thickened.

Remove the hot baklava bites from the oven. Slowly spoon the warm honey syrup over each bite. Let them cool completely so the syrup soaks into every layer.