Butter a 9x13 glass dish
Melt butter and 1 bag mini marshmallows over low heat. Add vanilla extract and sea salt. Remove from heat.
Pour in the rice crispies, and Oreo crumbs and gently mix. Add the extra cup of marshmallows and stir in.
With buttered hands or paper press rice crispy mixture into dish evenly and sprinkle with additional Oreo crumbs, then gently press those in.
Let cool, cut and enjoy!
