The Shulchan Aruch · Orach Chayim
אורח חיים קס״חOrach Chayim 168
Siman 168 of 697 in Orach Chayim — 17 se'ifim
הלכות סעודהLaws of the Meal· siman 168
Se’if 1א׳
הָיוּ לְפָנָיו חֲתִיכוֹת שֶׁל פַּת, וּפַת שָׁלֵם הַכֹּל מִמִּין אֶחָד, מְבָרֵךְ עַל הַשָּׁלֵם אֲפִלּוּ הוּא פַּת קִבָּר (פי' לֶחֶם שֶׁאֵינוֹ נָקִי) וְקָטָן, וְהַחֲתִיכוֹת פַּת נְקִיָּה וּגְדוֹלָה; אֲבָל אִם הַשָּׁלֵם שְׂעוֹרִים וְהַחֲתִיכוֹת מֵחִטִּים, אֲפִלּוּ הִיא קְטַנָּה מַנִּיחַ הַפְּרוּסָה תַּחַת הַשְּׁלֵמָה וּבוֹצֵעַ מִשְּׁתֵּיהֶן יַחַד. הַגָּה: וְכָל זֶה כְּשֶׁרוֹצֶה לֶאֱכֹל מִשְּׁנֵיהֶם, אֲבָל אִם אֵינוֹ רוֹצֶה לֶאֱכֹל אֶלָּא מֵאֶחָד, יִבְצַע עָלָיו וְאֵין לָחוּשׁ לַשֵּׁנִי, אַף עַל פִּי שֶׁחָשׁוּב אוֹ חָבִיב עָלָיו (תְּרוּמַת הַדֶּשֶׁן סי' ל"ב).
On which types of bread the blessing is said. Pieces of bread and a whole bread were before him, all from one kind – he recites the blessing on the whole one, even if it is a coarse (meaning: bread that isn't pure) and small bread and the pieces are pure bread and large. But if the whole one is barley and the pieces are from wheat, even if it is small, he places the piece under the whole one and breaks from both of them together. Rema: And all this is when he wants to eat from both of them. But if he only wants to eat from one, he should break on it and should not be concerned for the second one, even though it's valuable or liked by him (Terumat HaDeshen, No. 32).
Se’if 2ב׳
אִם ב' שְׁלֵמוֹת מִמִּין אֶחָד, אַחַת גְּדוֹלָה וְאַחַת קְטַנָּה, מְבָרֵךְ עַל הַגְּדוֹלָה; אִם יֵשׁ לְאָדָם שְׁנֵי חֲצָאֵי לֶחֶם וְאֵין לוֹ לֶחֶם שָׁלֵם, יְחַבְּרֵם יַחַד בְּעֵץ אוֹ בְּשׁוּם דָּבָר שֶׁלֹּא יְהֵא נִרְאֶה, וְדִינוֹ כְּדִין שָׁלֵם; וַאֲפִלּוּ בְּשַׁבָּת יָכוֹל לְחַבְּרָם.
If 2 whole ones, from one kind, one large and one small, he recites the blessing on the large one. If a person has two half-pieces of bread, and he doesn't have a whole bread, he should connect them together with wood or with anything so that it shouldn't be seen, and it has the law of a whole one. And even on Sabbath, he could connect them.
Se’if 3ג׳
שְׁנֵי גְּלוּסְקָאוֹת הַדְּבוּקִים יַחַד שֶׁנֶּאֱפוּ וְנֶחְתַּךְ מִן הָאַחַת וְהַשְּׁנִיָּה נִשְׁאֲרָה שְׁלֵמָה, טוֹב לְהַפְרִיד הַחֲתִיכָה מֵהַשְּׁלֵמָה כְּדֵי שֶׁתְּהֵא נִרְאֵית שְׁלֵמָה, מִמַּה שֶּׁיַּנִּיחֶנָּה דָּבוּק בָּהּ אַף עַל פִּי שֶׁנִּרְאֵית יוֹתֵר גְּדוֹלָה. הַגָּה: וְלֹא יִבְצַע מִמֶּנָּה בַּמָּקוֹם שֶׁהָיְתָה דְּבֻקָּה בַּחֲבֶרְתָּהּ, שֶׁשָּׁם נִרְאֵית כִּפְרוּסָה, אֶלָּא יִבְצַע מִמָּקוֹם הַשָּׁלֵם שֶׁבָּהּ (מַהֲרִי"ל).
Two buns that are connected to each other which were baked, and a piece of the one was cut off, and the second one remained whole – it is better to separate the piece from the whole one, so that it should look whole, rather than to leave it connected to it, even though it looks larger. Rema: And he should not break from it at the place where it was connected to its "friend", for there it looks like a broken piece. Rather, he should break from its "whole" place. [Maharil].
Shulchan Aruch, Orach Chayim — Torat Emet 363 edition, via Sefaria — public domain
English: Sefaria Community Translation — CC0