No, I don't think that you can.
You can manipulate the elemental nature of your spells.
Benefit: Choose one energy type: acid, cold, electricity, or fire. You may replace a spell’s normal damage with that energy type or split the spell’s damage, so that half is of that energy type and half is of its normal type.
Note, it doesn't say that the base spell changes, only the damage type that is inflicted. So, you are still casting Cone of Cold, but the damage type is fire instead of cold. The key part of the Flaring that you left out is:
You dazzle creatures when you affect them with a spell that has the fire, light, or electricity descriptor.
So, since the original spell descriptor does not have the fire, light or electricity descriptor, the Flaring feat will not work.
This is, however, open to other interpretations on the part of your GM.