Heat a large pot over medium-low heat. Add the butter and allow it to gently melt, stirring to help it along.
Add the marshmallows to the melted butter, stirring to dissolve and combine. Turn of the heat.
Add the puffed rice cereal and stir to fully coat the cereal.
Pour the marshmallow coated cereal into a 9x13 casserole dish. Lightly press down to even it out.
Pour the condensed sweetened milk into a small saucepan over medium heat. Cook for several minutes until it turns a golden brown color. Remove from the heat and allow it to cool and thicken.
Add the chocolate to a microwave safe bowl. Working in 15 second intervals microwave the chocolate until melted, stirring in between. Add Dairy free milk to the melted chocolate and stir until it's smooth and combined.
Drizzle half of the condensed sweetened milk over the rice krispie treats.
Drizzle half of the melted chocolate over the rice krispie treats.
Stir together the remaining melted chocolate and condensed sweetened milk. Drizzle over the rice krispie treats.