Preheat your oven to 350°F (180°C) and line two baking sheets with parchment paper.

Cream the softened butter and granulated sugar until light and fluffy, about 2-3 minutes.

Add the egg and vanilla extract; mix until well blended.

In a separate bowl, whisk together the flour, baking soda, and salt, then gradually add to the wet ingredients.

Portion about 2 tablespoons of dough onto the baking trays.

Press a pineapple ring onto the top of each dough mound.

Sprinkle a pinch of sugar over each pineapple ring.

Bake for 11-13 minutes, or until golden at the edges.

Cool on the baking sheets for a few minutes before transferring to a wire rack.

Allow cookies to cool completely before serving.