Large amounts of waste generated by the disposal of non‐biodegradable packaging is a major concern that has stimulated the search for new materials for the development of environmentally friendly packaging. This study aims to produce cassava starch‐based foams incorporated with broken rice, a co‐product of rice milling. Foams were obtained by a thermopressing process, and the influence of broken rice concentration on the formulations is investigated. Broken rice addition is tested for 0 (control sample), 10, 15, 20, and 30% (w/w). Foams containing broken rice show lower thickness and higher density. With respect to water absorption capacity, the control foam and those with 10 and 15% (w/w) of broken rice addition do not present significant statistical differences for any of the tested times. Mechanical properties (tensile strain and maximum flexural stress) are positively influenced by the addition of 10% (w/w) broken rice. Foams made from formulations containing 10% (w/w) broken rice demonstrate higher tensile strain and maximum flexural stress values compared to control foams. Additionally, these foams exhibit a good appearance without superficial cracks. Broken rice is evaluated as an additive in cassava starch‐based foams. Starch‐based foams with broken rice addition (0, 10, 15, 20 and 30%, w/w) are produced by a thermopressing process. Foams containing 10% (w/w) broken rice present higher tensile strain and maximum flexural stress. In addition, these foams are homogeneous, without superficial cracks. [ABSTRACT FROM AUTHOR]