Line an 8x8 pan with parchment paper then set aside.
In a food processor, grind the strawberries into a fine powder and set aside.
1 oz freeze dried strawberries
In a large bowl, microwave the marshmallows, vanilla extract, and butter together until melted for 1-2 minutes.
10 oz mini marshmallows, 4 tbsp butter, 1/2 tsp vanilla extract
Add in the rice krispy cereal and the strawberry powder and mix with a spatula until well coated. Mix in the extra cup of mini marshmallows and mix.
5 cup rice krispie cereal
Gently spread the cereal mixture into an even layer. Make sure not to press too hard we don't want our rice krispies to be too dense. Allow them to cool down for 30 minutes at room temperature before slicing and enjoying them.