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

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

Incorporate the eggs one at a time, then mix in the vanilla extract until well combined.

Gradually mix in the flour until just combined; do not over-mix.

Fold in the Fruity Pebbles until evenly distributed throughout the dough.

Scoop the dough onto the prepared baking sheets, spacing them about two inches apart.

Bake for 10-12 minutes until the edges are golden brown but the centers are still soft.

Let the cookies cool on the sheets for a few minutes, then transfer to a wire rack to cool completely.

Once cooled, frost the cookies and sprinkle additional Fruity Pebbles on top.