Red, White, & Blue Party Shot

• Nonstick cooking spray, for pan

For white layer

• 3/4 cup

  whole milk

• 1/4 cup

  heavy cream

• 1/2 cup

  marshmallow crème

• 2

  packages gelatin

• 1/2 cup

  vodka

For red layer

• 1 cup

  boiling water

• 1

  package strawberry Jell-O

• 1/2 cup

  vodka

• 1/2 cup

  sliced strawberries

For blue layer

• 1 cup

  boiling water

• 1

  package berry blue Jell-O

• 1/2 cup

  vodka

• 1/2 cup

  blueberries