PRO TIP: You can experiment with different layer thicknesses, but for the best texture, keep the plain black coffee layers fairly thin and position them toward the middle or bottom of the popsicle. Because unsweetened black coffee freezes hard like solid ice—whereas the creamer mixture stays nice and soft—keeping the black coffee layers thin delivers that bold coffee flavor without creating a hard, icy bite! The below image is the ones that I found to be the best as far as the layering goes.