Preheat oven to 350 degrees and line a baking sheet with parchment paper. Set aside
Using a stand mixer add the paddle attachment and beat softened butter and sugars on medium speed until light and fluffy.
Next add eggs and vanilla and beat until smooth.
Add flour, cornstarch, baking soda and salt. Using a spoon, mix until just combined and no streaks of flour are remaining.
Fold in crushed fruity pebbles and white chocolate chips.
Chill the dough for at least 30 minutes.
Use a large spoon to scoop out the cookies. Dropping them 2 inches apart. Bake at 350 for 11 minutes and remove from the oven. Allow to cool, before transferring to a wired rack or plate. Enjoy!