The invention relates to methods for preparing a beverage comprising at least 2 g/L β-glucan, wherein said β-glucans have an average molecular weight in the range of 80 to 200 kDa. The methods involve mashing barley kernels comprising at least 10% β-glucans and having a ratio of DP3/DP4 in said β-glucan of at least 3 in the presence of α-amylase and endo-1,3(4)-β-glucanase activity. The beverages have a viscosity providing a good mouth-feel, and at the same time they comprise β-glucans, which are able to aid in lowering LDL cholesterol levels. The beverages are generally stable and can be stored for months at room temperature without a significant decrease in β-glucan content.