Kellogg's Trésor Choco Brownie cereal

Kellogg's Trésor is a popular European breakfast cereal brand, known for its crunchy cereal pillows with various chocolate and nut fillings. The brand originated as a spin-off of the Smacks line in Europe around 2001, built upon the global heritage of the Kellogg Company which was founded in Battle Creek, Michigan, USA, by Will Keith Kellogg in 1906.

In recent years, the brand's ownership structure has undergone significant changes. Following a corporate split in late 2023, the global snacking and international cereal business was renamed Kellanova. By 2026, the brand is part of a larger global portfolio under new ultimate ownership. While the North American cereal operations (WK Kellogg Co) were acquired by Ferrero in late 2025, the international Trésor brand (under Kellanova) has become part of the Mars family following their acquisition of Kellanova. Manufacturing for the European market remains regional, primarily within the European Union, to maintain supply chain efficiency.