Pumpernickel coffee flavor, and earthy aroma. To achieve this, loaves are baked in long narrow lidded pans 16 to 24 hours in a low-temperature (about ), steam-filled oven. Like the French "pain de mie", Westphalian pumpernickel has little or no crust. It is very similar to rye "Vollkornbrot", a dense rye bread with large amounts of whole grains added. Pumpernickel varieties are popular in the Netherlands, under the name , where it has been a common part of the diet for centuries, and in Denmark where is a staple. German pumpernickel is often sold sliced in small packets in supermarkets, where
What Love Is Made Of three minutes and fifty-five seconds (3:55), "What Love Is Made Of" is an uptempo dance and house track that has been described as "rave-y" and "trance-y". Its instrumentation contains the sounds of pianos and synthesizers. Jordan Sargent of "Spin" observed that it continued the musical style first introduced in Katy's 2012 extended play (EP), "Danger EP", which was "straight-forward house". Idolator's Sam Lansky compared her performance in the song to recording artist Siobhán Donaghy. Critical response to "What Love Is Made Of" was generally positive: most critics noted Katy's vocal performance and commended its sound. Siân Rowe from "NME" was