1. In large saucepan melt butter over low heat. Add marshmallows and stir until completely melted. Remove from heat.
2. Add rice bubbles and hemp hearts and stir until well coated.
3. Press mixture into 13 x 9 x 2-inch pan lined with baking paper, leaving extra to remove slice.
4. Carefully remove slice from tray as a slab using the baking paper, and using a heart-shaped cookie cutter cut out your shapes. (You can get creative with the offcuts as well, or re-press to make more cut-outs)
5. Refrigerate hearts until set and get creative with your decorating using white chocolate or icing.
MICROWAVE DIRECTIONS:
In microwave-safe bowl heat butter and marshmallows on HIGH for 3 minutes, stirring after 2 minutes. Stir until smooth. (Microwave cooking times may vary!)
Follow remaining steps as above.