Whisk the yolks and sugar together until pale yellow.
5 yolks, 1/3 cup sugar
Warm the milk and cracked cardamom pods until it just lightly simmers.
2 cups milk, 20 cardamom pods
Temper the egg/sugar mixture with the milk/cream mixture, by pouring a little of one into the other then vice versa.
Return to the saucepan and cook, stirring slowly and constantly, until it reaches a termperature of 170°F. Turn off the heat, cover, and steep for 10 minutes.
Strain the cardamom from the ice cream base.
Add the cream. Cover, and chill in the refrigerator for at least 6 hours, and up to overnight.
1.25 cups cream
Add your chilled ice cream to your ice cream maker. Churn on the stir setting until it is the thickness of soft serve ice cream, ~20 minutes. You can enjoy it now at a soft serve consistency, or continue to the final step for ice cream consistency.
Transfer to a container you can freeze, cover with parchment paper if it doesn’t have a lid, and freeze for at least 4 hours.
Notes
If you cannot wait the 4 hours to chill the ice cream before churning it, you can chill it quickly over a bowl filled with ice water. Just stir the ice cream to cool the base faster than your refrigerator can.