This is my wife's favorite, a vanilla custard modification:
Chocolate Almond Ice Cream (1 Quart)
½ C Sugar
4 Egg yolks (or 2 eggs)
2 T Flour
1/8 t Salt
1 C Milk (or Half & Half)
1 Vanilla bean (or ½ T vanilla extract)
2 T Cocoa powder
1 Sq Semisweet Chocolate (full square)
2 C Whipping Cream (or Half & Half)
1 t Almond extract
1 T Vodka
Combine eggs and sugar in bowl.
Combine flour, salt, and vanilla in saucepan. Gradually stir in milk. Cook over medium heat approximately 15 minutes or until thickened and chocolate has melted, stirring constantly until temperature is between 165 to 180.
Gradually stir about 1/2 cup of hot mixture into the beaten eggs/sugar stirring constantly. Pour egg mixture into saucepan and stir. Cook at 180 for 1 minute. Remove from heat and let cool. Refrigerate 2 hours. Add remaining ingredients, mix and freeze.