Why does Dee think Mama and Maggie don't understand their heritage?

because they don't change from it. In Dee's mind, Maggie and Mama lack the "Ethnic Pride

Explanation:

in my Reese's cups i have some melted milk chocolate, then you get some peanut butter, (preferably smooth) and then you take a cupcake tin and you gently and slowly pour some melted chocolate into the cupcake tin, then you add a layer of peanut butter. Next you will cover the top of the peanut butter with another layer of the melted chocolate. Then you will refrigerate for about an hour or two and Viola! fresh homemade Reese's cups