Mix allulose with ice cream stabilizer and set aside. If replacing the stabilizer with vodka + xanthan gum, don’t add them here. Instead add with the vanilla.
Melt butter in a saucepan over medium-low heat.
Add pecans and salt; roast until fragrant.
Add sweetener and heat until it’s golden brown.
Add almond milk and cream. Continue cooking until the temperature reaches 180 °F and the mixture has turned a strong golden brown.
Remove pecans and set aside. Then, temper the egg yolks, transfer the mixture back to the saucepan, and continue cooking on medium-low heat until thickened and able to coat the back of a spoon, ~5 min.
Strain into a bowl, refrigerate for at least 4 h (preferably overnight).
Freeze in an ice cream machine, adding pecans when about 5 minutes remain.