Yes, you can use frozen raspberries in a lemon cake. Frozen raspberries can be a convenient option when fresh raspberries are not in season or readily available. Here's a general guideline on how to incorporate frozen raspberries into a cake: 1. Thaw the Raspberries: Allow the frozen raspberries to thaw completely. You can do this by placing them in a colander or sieve and allowing them to sit at room temperature for about 30 minutes. Once thawed, gently blot them with a paper towel to remove any excess moisture. 2. Adjust for Moisture: Frozen raspberries tend to release more moisture when baked, so it's a good idea to slightly adjust the moisture content of your cake batter. You can achieve this by reducing the amount of liquid (such as milk) in the cake recipe by about 1 tablespoon. 3. Adjust Baking Time: Since frozen raspberries can add extra moisture to the batter, it may slightly affect the baking time. Keep an eye on the cake as it bakes and use a toothpick or cake tester to check for doneness. If needed, bake the cake for a few minutes longer than the original recipe suggests.