"Motto" lozenges were little sugar confections molded with sayings on them. There's a recipe for them in The Complete Practical Confectioner (1890) which includes the instructions:

If for instance a boiling of rock is wanted with the word LOVE running all through it, boil 7 lbs of good loaf sugar with the usual quantity of cream of tartar to a little under the crack. Pour it on a warm slab; color one-half of the boiling red, and pull the other half over the hook; if the slab be not very warm lay both the red sugar and the pulled on a piece of hard wood, which will keep it moister than the iron would; then cut off a small piece of the red sugar and flatten it on the slab to cool and harden it. With this piece of red sugar form the letter L, working the white pulled sugar (which is stiffer) all round this letter, keeping it in shape. When this is done stand it on one side; take another piece of pulled sugar and roll it round and about 1 1/2 inches thick and case this all round with red sugar, and case again with white sugar over the red, which will give the letter O; put this aside also, take another piece of red sugar and form the letter V, working the white pulled sugar all between and round it. Form the letter E in the same way; when done lay them in order--LOVE--and put whatever quantity of white sugar is left round the word, casing the whole round with the remainder of red sugar.

And so on and so forth; there are a number of different recipes for making motto lozenges, and there was a bit of a craze for them in the late 19th and early 20th century.