This study examines the semantic classes and syntactic order of English adverbial clauses in knead until smooth, a British cookbook by Jamie Oliver (2020). Adverbial clauses are important in English language use since they help support the flow of information (Diessel, 2005). While previous studies focused on English adverbial clauses in scientific texts, psychological texts, and argumentative essays, the results of these previous studies show that conditional and concessive adverbial clauses are productive in these studies. To date, no study examines English adverbial clauses in cookbooks. This study contributes something new in the field by investigating English adverbial clauses in a British cookbook as it is considered as everyday reading material. The data is collected from Jamie Oliver’s (2020) cookbook since he is globally accepted as a celebrity chef. Therefore, the data in his cookbook is regarded as a reliable source (Piper, 2015). The British English variety is focused on this study as it is a variety whose literature has been circulated the widest. The total data collection from the source is 60,000 words, made up of 81 extracted tokens of various adverbial clauses. The data analysis of adverbial clauses in cookbooks will be classified according to their semantic classes, such as temporal adverbial clauses, concessive adverbial clauses, and adverbial clauses of the result. The results in this study reveal that temporal adverbial clauses occur the most at 90 percent (i.e. let it all get golden, while you heat the grains according to the packet instructions and wait until it turns golden). The high frequency of temporal adverbial clauses in this study is explained by the principle of iconicity and the end-weight principle. It is hoped that the results of this study will be useful for those learners of English and a Foreign Language (EFL) and English as a Second Language (ESL).