Preheat your oven to 350°F and line a baking sheet with parchment paper. Cream butter and sugars

In a large bowl, use an electric mixer to beat the butter, brown sugar, and granulated sugar together until light and fluffy, about 1–2 minutes.

Add eggs and vanilla. Mix in the egg, egg yolk, and vanilla extract until fully combined.

Add dry ingredients. Add the flour, baking powder, and baking soda. Mix just until the dough comes together. Be careful not to overmix.

Fold in chocolate. Use a rubber spatula to gently fold in the chocolate chips and M&Ms.

Scoop the dough. Scoop 2–3 tablespoons of dough per cookie and place on the prepared baking sheet, leaving space between each cookie.

Bake for 9–12 minutes, until the edges are lightly golden but the centers still look slightly soft.

Right after the cookies come out of the oven, they may look slightly uneven or puffy. While they are still warm, place a large round cookie cutter or drinking glass over the cookie and gently swirl it in a circular motion.

When the cookies are still warm, press one whole pastel M&M into the center of the cookie. Take another M&M and carefully cut it in half to create the bunny ears. Place the two halves above the whole M&M to form the ears.