Preheat your oven to 350°F (175°C) and line baking sheets with parchment paper.

In a large mixing bowl, cream together softened unsalted butter, granulated sugar, and brown sugar until light and fluffy.

Add in one egg and beat well until fully combined.

In a separate bowl, whisk together all-purpose flour, baking soda, and salt. Gradually add this mixture to the wet ingredients.

Scoop prepared dough, flatten in your palm, add a spoonful of pistachio cream, and seal the dough around it.

Place the formed cookie on the lined baking sheet, ensuring enough space between each.

Bake for 10-12 minutes until edges are lightly golden and centers remain soft.

Cool on the baking sheet for 5 minutes before transferring to a wire rack.