Beat butter, white sugar, brown sugar, and vanilla extract in a bowl with an electric mixer until fluffy. Beat egg into the mixture using a wooden spoon. Stir in flour mixture until fully combined. Fold chocolate chips, pecans, and white chocolate into the dough.
Drop dough by rounded teaspoonfuls onto 4 ungreased baking sheets.
Bake in the preheated oven until golden brown, about 12 minutes.