Use an oven thermometer placed in center of oven for an initial reading of oven temperature. Record results here: ___________. When oven is properly preheated, place fi lled muffi n pans in oven and...

Use an oven thermometer placed in center of oven for an initial reading of oven temperature. Record results here: ___________.

When oven is properly preheated, place fi lled muffi n pans in oven and set timer for 20–22 minutes, or according to formula.