Coat a 8-inch square pan with cooking spray and set aside.

In a small saucepan, combine honey, brown sugar, and butter. Heat mixture until just boiling over medium heat, stirring occasionally. Remove from heat and let it cool to room temperature.

Pour honey mixture over Honey Bunches of Oats Honey Roasted cereal and trail mix in a large mixing bowl and stir until evenly coated.

Using a spatula, press mixture evenly and firmly in prepared pan. Refrigerate for about 1 hour or until firm enough to cut. Cut into bars or squares and store covered at room temperature for up to one week.