Assertion: baking powder | /r/HasProperty | heated in the oven
Facets:
Source sentences:
text: The leavening action begins when the baking powder is mixed with moisture and again when heated in the oven.
text: this means that it first releases a small amount of carbon dioxide (leavening) when combined with wet ingredients, and then releases the majority of the leavening when the baking powder is heated (in the oven).