If you're doing current sensing (sizzling implies high power, so you need feedback), don't use cheap thick-film resistors. Use (4-terminal) with 50ppm or better temperature coefficient. A 1% drift in sensing can mean 10°C extra on your MOSFETs.
The best sizzling design never hits the oven without a simulation. Free tools like LTSpice (or paid like SIMetrix, ADS) can predict where heat and oscillation will kill your vibe. circuit design sizzling
