To-bread

Sc. [f. TO-¹ + BREAD.] Additional bread; = IN-BREAD sb. Also fig.

1854.  N. & Q., 1st Ser. X. 531/2. The Scotch baxter … may at times … give a farthing biscuit—as what is called ‘too (or additional) bread’—on the purchase of a shilling’s worth.

1868.  J. Salmon, Gowodean, III. vii. 104. You were yoursel’ the ‘to-bread’ to the gift.