Provided are a fat composition which can impart volume, softness, and moistness to a puffed wheat food product or the like; a puffed wheat food product containing the fat composition; and a production method for the fat composition. The present invention provides a fat composition containing an alginic acid ester having a degree of esterification of at least 23% but less than 75%. The fat composition may be an emulsified fat composition. The present invention also provides a puffed wheat food product containing the fat composition, and a production method for the fat composition.提供一種油脂組成物、添加有該油脂組成物之小麥膨化食品、及該油脂組成物的製造方法,其中,該油脂組成物可對小麥膨化食品等賦予份量感、柔軟感及濕潤感。本發明提供一種油脂組成物,其含有酯化度為23%以上且未滿75%的褐藻酸酯。前述油脂組成物,亦可為乳化油脂組成物。本發明提供添加有上述油脂組成物之小麥膨化食品、及上述油脂組成物的製造方法。