Lightly spray or rub a small amount of oil inside the brain mold, then wipe away any excess.
Place the oiled mold on a stand or stable surface and set it aside.
In a large bowl, dissolve the flavored gelatin in 2 ½ cups of boiling water, stirring for about 3 minutes.
Add 1 cup of cold water to the gelatin mixture and stir.
Stir in evaporated skim milk for about 2 minutes until well combined.
Pour the gelatin mixture into the mold, leaving about 1 inch of space at the top.
Refrigerate the mold overnight to set.
To remove the brain, gently shake the mold to loosen the gelatin, then flip it over onto your hand or a plate.
For a "bloody" effect, mix ¼ cup seedless raspberry jam with a teaspoon of water and microwave briefly. Stir, then drizzle over the brain. Enjoy the spooky effect!