cooking blenders have powerful motors and when blending at their highest speed, blade tips spin up to 310 miles per hour and spins at about 250 miles per hour. When the powerful stainless steel blades spin this fast in such a SMALL SPACE, this causes enough friction to heat and even cook the contents. cooking mixer have razor-sharp blades quickly chop or mince foods; push-button digital controls make it easy to set cooking time and temperature,three temperature settings- bringing soup from a gentle simmer to a boil; thermal shock-resistant glass container with plastic base,four speeds; plus stir and pulse functions; blend ingredients to desired consistency.