In France, the praline generally takes the form of a candy (called chouchou in Belgium) whose heart is an almond or a peanut, whereas in Louisiana (United States) it is rather made of pecan nuts, brown sugar, butter and cream. In all cases, a praline contains at least peanuts and generally has a hazelnut taste that can be found in Paris-Brest or Trianon.
In Lyon, it is its crunchy version that is favored with a coloring specific to the 3rd largest city in France: pink. This caramelized candy was born in the 19th century in Montargis (after a chef accidentally dropped a nut in melted sugar) and its first use is traced in a recipe in Saint-Genis-Sur-Giers. A pastry chef then created a brioche with a pink praline on its crust and, given its success, created a version filled with this greedy mixture.