Offering food to a non religious Jew touches upon the prohibition against causing a fellow Jew to stumble in sin, as he will likely eat the food without a blessing. The following is the law:

One should only offer food to one who one knows will recite a blessing.[2] However, some are lenient if one gives the food to a pauper as charity.[3] However, if one knows for certain that he will not say a blessing, then it is forbidden to offer him food even as charity.[4] However, some Poskim[5] are lenient altogether to permit giving food to individuals who will not recite a blessing, and doing so does not transgress Lifnei Iver.[6] Practically, when offering food to someone who may not recite a blessing, one should tell him to recite a blessing beforehand and offer him a Kipa to do so.[7] However, in the event that one is unable to do so, such as due to fear of shaming the individual or causing a Chilul Hashem, then one may offer him the food regardless.[8] Certainly, one may offer food and beverage to a nonreligious Jew to establish a relationship for the sake of Kiruv.[9]

• Example: You invite a non-religious colleague to a holiday meal and, before serving, gently mention the tradition of reciting a blessing, perhaps offering a kipa to help make the moment meaningful. If they decline, you proceed with kindness, prioritizing the relationship.
• Example: While volunteering at a community food bank, you encounter recipients who may not observe religious practices. Out of respect, you may offer food without expectation, focusing on charity and avoiding embarrassment.
• Example: At a luncheon with potential outreach participants, you serve refreshments even if not all present are expected to say a blessing, recognizing the value of hospitality in building bridges for future dialogue.
• Example: During a large family gathering, you notice a relative who does not typically recite blessings. You discreetly encourage the custom, but if they are uncomfortable, you offer the meal nonetheless to maintain harmony.
• Example: In an educational setting, sharing snacks with students from varied backgrounds, you might explain the tradition and invite participation, but ultimately provide food regardless of religious observance, fostering inclusion and understanding.

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[1] Michaber 169:2; Kaf Hachaim 169; Piskeiy Teshuvos 169:3

[2] Michaber ibid; Rabbeinu Yona Brachos 42a

[3] Rama ibid; Rabbeinu Yona Brachos 42a; Elya Raba 169:2; Olas Tamid 169:3; Soles Belula 169:1; See Kaf Hachaim 169:13-14

Other opinions: Some Poskim rule that even when given as charity, it is forbidden. [Beis Yosef 169; Rashal; See Kaf Hachaim 169:13]

The reason: As giving charity is a definite Mitzvah while whether or not he will recite a blessing is a doubt, and we do not cancel a definite Mitzvah due to Safek. [Taz 169:3; See Kaf Hachaim 169:13]

[4] M”A 169:6; Shelah p. 82; Olas Tamid 169:3; Elya Raba 169:2; M”B 169:11; Kaf Hachaim 169:14

[5] Bach 169, brought in M”A ibid; See Kaf Hachaim 169:13 and 15

[6] The reason: As there is no transgression taking place by simply giving him the food, and if he decides to afterwards to not recite a blessing upon eating it, what could the person have done. [M”A 169:6]

[7] Shelah p. 82; Kaf Hachaim 169:13; Shevet Halevi 8:47; Teshuvos Vehanhagos 2:138; Piskeiy Teshuvos 169:3; See Igros Moshe O.C. 5:13

[8] See Igros Moshe O.C. 5:13; Minchas Shlomo 1:35; Shevet Halevi 4:17; Teshuvos Vehanhagos 1:483; 2:138; Shevet Hakehasi 4:329; Piskeiy Teshuvos 169:3 footnote 13

[9] Shevet Hakehasi ibid