The Easy-Bake Oven was introduced in 1963 as a working over first manufactured by Kenner and then by Hasbro. The original set baked with two ordinary incandescent light After mixing with water, then pan wash pushed through the oven to cook. In 2006 Hasbro had problems with caught fingers and burns and almost half a million had to be recalled.
In "The Porkchop Indeterminacy", Missy related the story of how Sheldon converted her Easy Bake Oven into a powerful furnace, which burned off her eyebrows. This was so he could bake his own integrated circuits.