Rice Krispie Treats with Maple Syrup and Brown Sugar

Grease a 9x13 pan, or line with parchment paper.Melt butter over medium-low heat in large pot.Add the brown sugar and maple syrup and stir until the brown sugar has dissolved.Add the marshmallows and stir until they have melted.Take off heat.Add the sea salt and vanilla and stir.Add rice cereal and toasted pecans to the melted marshmallow mixture and then press into prepared pan.Let cool.