Processing of Red Velvet Cake Using Natural Dyes of Red Bitter Fruit (Beta Vulgaris) And Red Spinach (Amaranthus Tricolor Linn). agriscience [Internet]. 2021 Jul. 6 [cited 2025 Oct. 10];4(2):126-32. Available from: https://agriculturalscience.unmerbaya.ac.id/index.php/agriscience/article/view/55