A no-machine soft serve sundae bar with a mascarpone-stabilized swirl base that resists melting and a cracking brown butter magic shell.
Chill your bowls — this matters more than any other step. Don’t over-whip the cream past soft peaks or the swirl turns grainy once frozen instead of ribboned. Pipe the swirls at least 4 hours ahead (or up to 3 days, wrapped) so you’re not racing the freezer on serving day. Keep the magic shell warm over low heat between pours so it stays pourable.