I can't seem to figure out how to brew a sweet shot.
I have an E61 HX machine (Expobar Office Leva) and a Compak K3 grinder; I've been using Red Bird Espresso as well as their holiday blend. I normally make lattes and am pleased with the flavor and smoothness. I've read on this forum of members referring to shots that have a subtle sweetness. So I decided to taste a shot straight as I normally make it. It definitely doesn't have any sweetness to it, and I frankly can't tell if it's sour, bitter, or both.
My standard is:
1) 16.5g in a 15g VST, ~34.5g yield in 25-30 seconds (I always stop the shot at blonding onset or prior).
To try to get a sweet shot, I tried:
2) 19g in a 20g VST, ~30g yield in 25 seconds. This shot tasted bolder, but I couldn't tell any difference in sourness/bitterness. Definitely didn't taste sweeter.
3) 14g in a 15g VST, unknown weight (got about an ounce in volume, had to stop shot due to channelization causing early blonding). Still tasted sour/bitter, not sweet.
I feel like I've tried opposite ends of the spectrum to achieve a sweet shot. I think part of my problem is that I can't tell if my shots are sour, bitter, or both. Do you all have any suggestions?