4-Count Duncan Hines Mug Cakes (Lemon Cake & Frosting or Caramel Flavored Brownie) $2.40 w/ S&S + Free S&H w/ Prime or $25+

Amazon has 4-Ct Duncan Hines Mug Cakes (Lemon Cake and Frosting) for $2.38 when you check out with Subscribe & Save. Shipping is free with Prime or $25+ orders.
Amazon also has 4-Ct Duncan Hines Mug Cakes ( Caramel Flavored Brownie Mix) for $2.36 when you check out with Subscribe & Save. Shipping is free with Prime or $25+ orders.