The invention relates to an apparatus for boiling an egg, said apparatus comprising a device for providing microwave radiation in a confined space, said space further comprising a holder provided with at least one cavity adapted to the shape of an egg with an eggshell, said cavity provided with a first layer surrounding the eggshell, said first layer: -is in heat exchanging contact with the shell of the egg -has a dielectric constant with an imaginary part, ε", between 20-500 at a temperature between 0°C -100°C and at a microwave frequency of 2.45 GHz, and -having a layer thickness d of 1-6 millimetre and varying less than 30 % over the egg, or said holder for holding at least one egg assembly adapted for cooking an egg using microwave radiation, said egg assembly comprising an egg having an eggshell which is provided with an packaging surrounding the eggshell, said packaging comprising a first layer which: -enfolds the shell of the egg and is in heat exchanging contact with the eggshell -has a dielectric constant with an imaginary part, ε", between 20-500 at a temperature between 0°C -100°C and at a microwave frequency of 2.45 GHz, and -has a layer thickness d of 1-6 millimetre and which varies less than 30 %, and -said packaging designed to retain the layer thickness of the first layer while said egg assembly is subjected to said microwave radiation to turn said egg into a boiled egg.La invención se refiere a un aparato para hervir un huevo, dicho aparato comprende un dispositivo para proporcionar radiación de microondas en un espacio cerrado, dicho espacio comprende además un soporte provisto de al menos una cavidad adaptada a la forma de un huevo con cáscara, dicha cavidad está provista con una primera capa que rodea a la cáscara de huevo, dicha primera capa: -se encuentra intercambiando calor por contacto con la cáscara de huevo -tiene una constante dieléctrica con una parte imaginaria, , entre 20-500 a una temperatura entre 0°C- 100°C y a una frecuencia
