01 - Lightly grease a 9x13-inch baking dish or line with parchment paper to facilitate easy removal.
02 - In a large heatproof bowl, add the flavored gelatin and unflavored gelatin.
03 - Pour the boiling water over the gelatin mixture. Stir thoroughly for 2 to 3 minutes until the gelatin is completely dissolved.
04 - Pour the dissolved gelatin mixture into the prepared baking dish.
05 - Refrigerate for a minimum of 4 hours, or until the gelatin is fully set and firm.
06 - Run a knife around the edges to loosen the gelatin and invert onto a cutting board.
07 - Cut into squares, rectangles, or use cookie cutters for decorative shapes. Serve chilled.