Step 1

Preheat the oven to 375°F.

Step 2

Grease your baking dish and set aside.

Step 3

Soak raisins in hot water for 5 minutes, then drain.

Step 4

For best results, process cottage cheese in a food processor until texture is fine.

Step 5

Separate egg yolks and whites.

Step 6

In a large bowl with a mixer running on medium, combine butter, sugar, vanilla extract, cottage cheese, and egg yolks until well-mixed.

Step 7

Combine flour and salt and add to butter mixture a little at a time, mixing with a hand mixer on low until flour is fully incorporated.

Step 8

Combine baking soda and vinegar and add to flour mixture, mixing well. Set aside.

Step 9

Beat egg whites until stiff.

Step 10

Gently fold egg whites into flour mixture until it is fully incorporated.

Step 11

Pour batter into greased baking dish and level the batter.

Step 12

Bake for 35-60 minutes, until a toothpick comes out clean. Let cool. Remove from baking dish and dust with powdered sugar.