Salted Brown Butter Rice Krispie Treats

To make add butter to large pot and begin to melt, stir until butter begins to brown bubble and then add in pumpkin, vanilla, and cinnamon and whisk to combine. Add in marshmallows and keep stirring until melted. Add in Rice Krispie cereal and stir to coat. Add to a parchment lined cake pan and smash down into an even layer. Sprinkle with flaky salt and let cool completely. Slice and serve!