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

Cream together unsalted butter and granulated sugar with an electric mixer until light and fluffy (3–5 minutes).

Add in the egg and vanilla extract, beating until well combined.

In a separate bowl, whisk together flour, baking soda, and salt. Slowly incorporate into the wet mixture, mixing until a soft dough forms.

Scoop about 1½ tablespoons of dough, roll into a ball, and slightly flatten before placing on the baking sheet.

Press one pineapple ring into the center of each cookie dough disk.

Sprinkle additional sugar on top of each pineapple ring.

Bake for 12–14 minutes, until edges are golden brown and centers remain soft.

Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack.