01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a large bowl, cream softened butter and powdered sugar until light and fluffy. Mix in vanilla extract.
03 - Add flour and salt to the butter mixture. Mix until just combined and a soft dough forms.
04 - On a lightly floured surface, roll dough to approximately 1/4 inch thickness. Cut out heart shapes using a cookie cutter.
05 - Place heart shapes on prepared baking sheets, spacing them 1 inch apart.
06 - Refrigerate cookies for 10 minutes to help maintain their shape during baking.
07 - Bake for 12 to 15 minutes, or until edges are just turning golden. Cool completely on a wire rack.
08 - Melt dark chocolate and coconut oil in a microwave or double boiler until smooth and fully melted.
09 - Dip half of each cooled cookie into the melted chocolate. Gently shake off excess chocolate and place on parchment paper.
10 - While chocolate is still wet, add sprinkles, sea salt flakes, or freeze-dried raspberries if desired.
11 - Allow chocolate to set fully at room temperature or in the refrigerator before serving.