Amazon has the 5-Count Atkins Endulge Treat (Lemon Tart, 1.2 oz each) for $5.09 - 35% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $3.14 with free shipping on $25+ or with Prime.

Dulce De Leche is on sale for slightly more.