01 - Preheat oven to 350°F. Line two baking sheets with parchment paper and set aside.
02 - Whisk together flour, baking soda, and salt in a medium bowl until thoroughly incorporated.
03 - Beat softened butter, brown sugar, and granulated sugar in a large bowl until light and fluffy, approximately 2–3 minutes.
04 - Incorporate eggs one at a time, beating well after each addition. Mix in vanilla extract until fully combined.
05 - Gradually add flour mixture to wet ingredients, mixing on low speed just until flour disappears. Avoid overmixing.
06 - Gently fold M&M candies and white chocolate chips into dough using a spatula until evenly distributed.
07 - Scoop dough balls using a medium cookie scoop or tablespoon. Place 2 inches apart on prepared baking sheets. Press extra M&M candies and optional bunny decorations onto tops.
08 - Bake for 9–11 minutes until edges are firm and set but centers appear slightly underbaked for optimal chewiness.
09 - Let cookies rest on baking sheets for 5 minutes to set. Transfer to wire rack and cool completely before serving.