Butter, Salted 16 oz (1 lb) 454 g Real challenge. Real difference. Real California milk. From cows not treated with the growth hormone rbST (No significant difference has been shown between milk derived from rbST-treated & non-rbST-treated cows.). Grade AA butter. First quality. Why people are looking forward to the Real Challenge: For 100 years, Challenge has been a highlight for food fanatics out west. Churned daily from 100% pure, pasteurized sweet cream and sourced from cows not treated with

Pasteurized cream (milk), salt.

Contains Milk and its derivates.