X-Brewing is a Dutch craft brewery founded by Eva ten Haaf, based in Katwijk, the Netherlands. Known for her outspoken brewing philosophy, Ten Haaf deliberately pushes boundaries and refuses to be limited by convention or rules. Rather than brewing crowd-pleasers, X-Brewing is built on a passion for bold, uncompromising beers that reflect a strong personal vision and identity. The brewery's portfolio leans toward intense, complex beer styles. X-Brewing is particularly noted for its stouts and robust ales, including a Pastry Stout clocking in at 10.8% ABV. The beers are brewed with character and depth, targeting adventurous craft beer drinkers who appreciate extreme flavour profiles and high-gravity brewing. The brand identity is clearly reflected in its tagline: "Beers with an X." X-Brewing has earned recognition within the Dutch craft beer scene. One of their Russian Imperial Stouts won Gold at the Dutch Beer Challenge and was awarded Best Beer of the Netherlands 2025 (HAL 3). The brewery collaborates with other notable names in the industry and has developed a reputation for pushing the limits of what Dutch craft beer can be.