Prepare a 13x9 baking dish by spraying it with non-stick cooking spray or baking spray.

Add butter to a saucepan and heat at medium. Don't let it burn. Continually stir with a wooden spoon and remove from heat when butter particles start to brown, about 5-8 minutes.

Add marshmallows to the brown butter and consistently stir until melted all the way.

In a large mixing bowl, mix up the rice krispies cereal with 2/3 of the marshmallow mixture and pour into the baking dish. Flatten using wax paper or a spatula sprayed with non-stick cooking spray.

Then, reheat the marshmallows if necessary and mix it up with the fruity pebbles. Add the fruity pebbles to the top of the rice krispies and flatten the same way.

Melt white chocolate in the microwave in 15 second increments. When mostly melted, add oil and mix well. Transfer white chocolate to a decorator bag and snip the end, drizzle over krispy treats and serve.

Chocolate tip: use milk chocolate for a completely different taste. If using candy melts, you may need to use less vegetable oil than noted here.