01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, baking soda, and salt in a medium bowl. Set aside.
03 - Beat softened butter, brown sugar, and granulated sugar in a large bowl until light and fluffy, about 2-3 minutes.
04 - Beat in eggs one at a time, then mix in vanilla extract until fully incorporated.
05 - Gradually add flour mixture to wet ingredients, mixing on low speed until just combined.
06 - Gently fold in M&M candies and white chocolate chips if using.
07 - Scoop dough balls using a medium cookie scoop or tablespoon, placing about 2 inches apart on prepared baking sheets. Top with extra M&M candies and optional bunny decorations.
08 - Bake for 9-11 minutes until edges are set and centers look slightly underbaked.
09 - Let cookies cool on baking sheet for 5 minutes before transferring to a wire rack to cool completely.