Analysis of the Acceptability of Steamed Sponge Cake with Purple Sweet Potato Flour and Mackerel Flour Substitution. LIPIDA [Internet]. 2026 Oct. 20 [cited 2026 Oct. 26];6(2):321-9. Available from: https://lipida.jurnal.politap.ac.id/index.php/lipida/article/view/1982