- This weekend, Walmart is celebrating everyone’s birthday by giving away free cupcakes. Just visit any Lowcountry Walmart Supercentre Sunday between noon and 4. You can choose between a vanilla or a chocolate cupcake with either white buttercream or whipped icing, the same recipe as Walmart’s birthday cakes. There’s no purchase necessary to get one of the free 3 million cupcakes Walmart expects to giveaway.