Slowly add the brown rice crispies into the melted chocolate bowl and fold in gently until everything is well incorporated and all crispies are covered with chocolate.
Transfer the mixture onto the baking tray with parchment paper and press down on the tray with a spoon or spatula to bring everything together and press the edges to form a rectangle or square.
Add the reserved melted chocolate over the mixture and use the back of your spoon or spatula to smooth over the mixture. This will help fill all the nooks and crannies with chocolate and ensure the mixture stays together, and doesn't crumble. Once you are done, place the tray in the freezer for 20-30 minutes.
NOTE: When I created these bars, I personally liked that the pieces were not uniform and each one was a different size and shape. However, if you prefer them to be more uniform, you can just score the bars with a knife to the desired shape and size you want before placing them in the freezer.
After they are set, remove them from the freezer and let them rest at room temperature for 10 minutes. Then with a knife gently press into the block to break up the pieces. As you press down they will naturally break off into pieces. Alternatively, if you scored them before placing them in the freezer you will have your uniform pieces. You now have some yummy crispy chocolate bars, ready to enjoy! However if you want to take them a step further to give them a real store-bought chocolate bar feel, continue on for the next steps.