Step 1

Zest and juice the oranges. You'll need at least 2 tablespoons of zest and 1/2 to 2/3 cup of fresh orange juice.

Step 3

Bring water to a simmer in the double boiler. Place the second pot on top. Combine the zest, orange juice, sugar and eggs. Stir or whisk constantly as the mixture starts to thicken. Cook until the eggs have come to a safe eating temperature of at least 160 degrees F.

Step 5

Add the cubes of butter and continue to stir for 15-20 minutes until the mixture is thicker and can coat the back of a spoon.

Step 7

Pour the orange curd into clean mason jars and store in the refrigerator.