01 -
Mix melted butter with both brown and granulated sugars until smooth and well combined. Add vanilla and egg, mixing until incorporated.
02 -
Mix in flour, salt, and baking soda on low speed until just starting to combine. Increase speed briefly for 15-30 seconds until smooth, scraping bowl as needed. Be careful not to overmix.
03 -
Gently fold in sprinkles and chocolate chips using a spatula or large spoon.
04 -
Using a heart-shaped cookie cutter on a parchment-lined baking sheet, press two tablespoons of dough into the cutter to form hearts. Remove cutter and repeat. Alternatively, hand-shape the dough into hearts.
05 -
Add extra sprinkles if desired, cover with plastic wrap, and refrigerate for 1.5 to 2 hours (or up to 24 hours).
06 -
Preheat oven to 350°F. Place chilled hearts 2-3 inches apart on lined baking sheet. Bake 4-6 cookies at a time for 8-10 minutes until edges are golden.
07 -
Immediately reshape hot cookies into hearts using a spatula or knife. Cool on baking sheet for 5-10 minutes, then transfer to wire rack.