In a large pan melt 4 Tablespoons of butter over medium-low heat. Add 6 Cups mini marshmallows. Stir constantly until melted and creamy.
Add in 1 Tablespoon Milk and 1 teaspoon vanilla into the melted marshmallow mixture. Stir until well blended.
Remove from the heat and allow to cool for 1 minute.
Add in 2 cups of pastel mini-marshmallows. Stir until partially melted but not completely melted. This will create the chewy marshmallow pockets!
Add 6 cups of Rice Krispie Cereal. Stir until cereal is coated.
Pour into a greased 9 x 13 pan and spread evenly. Do not press down too firmly. Just enough to even out. Be sure to grease hands or spatula when pressing down so krispie treats don't stick to your hands.
Set pan of Rice Krispie Treats aside.
In a small micro wave safe bowl place 1 cup of white chocolate chips. Add 1/2 Tablespoon of Vegetable Oil. Place bowl in Microwave at 50% and cook for 3 minutes. Remove from microwave and stir until melted.
Drizzle half of melted white chocolate mixture over top of the Rice Krispie's.
Top with the other 1 1/2 cups of pastel mini marshmallows. Gently press down into melted chocolate.
Drizzle remaining melted white chocolate on top of the marshmallows.
Sprinkle with Easter Sprinkles of your choice.
Allow to set up for at least 1 hour until chocolate is set. *You can place the pan into the refrigerator for 5 minutes until set.
Cut into squares and serve.
Store in air tight container.