When I first made this frozen yogurt it was a complete disaster. It did not freeze as expected probably because I did not place the ice cream bowl in the freezer for a long enough time. On top of that, the original recipe called for a lot more Greek yogurt, and therefore the end results were not very satisfying. I have modified the recipe below and added a touch of vanilla extract for a better flavor. Although I have not tried it yet, you can replace the condensed milk with 3/4 cup sugar and a teaspoon of freshly squeezed lemon juice. Hope you enjoy it.
3 cups fresh blackberries
2 cups whole milk Greek yogurt
1 can sweetened condensed milk
1 tbsp vanilla extract
In a blender, puree the blackberries with the sweetened condensed milk and vanilla extract. In a medium bowl mix the puree with the Greek yogurt. Press the mixture into a fine mesh sieve to remove the seeds (optional). Pour into your ice cream maker and follow the manufacturer's directions.
Source: adapted from The Perfect Scoop