Each ounce of cream cheese is approximately 2 tablespoons. A 1−tablespoon measuring spoon can be used to measure 1/2 ounce cream cheese.
Although it should be close, the measurement for the truffle candy does not need to be exact.
Instead of using tablespoon measurements, I generally cut a chunk of cream cheese for the appropriate weight.
The cream cheese I use comes in 8 ounce slabs. I divide the slab into approximately 1-ounce chunks. For 1/2 ounce, a 1-ounce chunk is cut in half.
How I cut an 8-ounce slab of cream cheese.
In the image, you can see how I divide it.
Cut the 8-ounce slab in half. You now have 2 chunks of 4 ounces each.
Cut the 4-ounce chunks in half. You now have 4 chunks of 2 ounces each.
Take one of those 2-ounce chunks (the others can be used later) and cut that one in half. You now have 3 chunks of 2 ounces, and 2 chunks of 1 ounce each.
To get a 1/2 ounce measure of cream cheese, cut one of the 1-ounce chunks in half.
