Chasidut for Pesachim 238:13

נימא מסייע ליה הסופגנין והדובשנין והאיסקריטין אדם ממלא כריסו מהן ובלבד שיאכל כזית מצה באחרונה באחרונה אין

Rab Judah said: One may not conclude after the [last] unleavened bread [is eaten]<span class="x" onmousemove="('comment',' I. e., nowadays at the end of the meal in memory of the Paschal lamb.');">¹⁷</span> by saying, 'Now to the entertainment!' We learned: YOU MAY NOT CONCLUDE AFTER THE PASCHAL, MEAL [BY SAYING], 'NOW TO THE ENTERTAINMENT!' Thus it is forbidden only after the Paschal meal, but you may conclude [thus] after the unleavened bread? - He proceeds to a climax:<span class="x" onmousemove="('comment',' Lit., 'he says, it is unnecessary" .'');"="">¹⁸</span> After the unleavened bread it need not be stated, since its taste is not substantial;<span class="x" onmousemove="('comment',' He must finish the meal with the taste of the Paschal lamb and the unleavened bread predominant in his mouth. Now the taste of the latter is not substantial and enduring, and therefore it is superfluous to teach that nothing may be eaten after it.');">¹⁹</span> but [I might think] that there is no objection after t Paschal lamb, whose taste is substantial and cannot [easily] be wiped out. Hence he [the Tanna] informs us [otherwise]. Shall we say that this supports him: [As for] sponge cakes, honey-cakes and iskeritin,<span class="x" onmousemove="('comment',' V. Supra 37a. These are regarded as 'rich mazzah' and therefore the duty of eating mazzah, which must be 'bread of affliction (poverty) ' cannot be discharged with them.');">²⁰</span> a man may fill his stomach with them, providing that he eats as much as an olive of unleavened bread at the end. [This implies], only at the end,

Kedushat Levi