Universal Classroom Breakfast Expansion Act

Universal Classroom Breakfast Expansion Act - Directs the Secretary of Agriculture to award competitive grants to states and, through them, subgrants to schools to assist such schools in establishing universal free breakfast programs that provide all of their students with free breakfasts for at least three years under the school breakfast program.

Requires students to be allowed to eat such breakfasts in the classroom after school starts.

Limits subgrant eligibility to elementary or secondary schools in which at least 40% of the students are eligible for free or reduced-price lunches under the school lunch program.

Directs state grantees to provide: (1) technical assistance to schools in implementing such programs; (2) targeted outreach to schools with the highest percentage of students who are eligible for free or reduced-price lunches under the school lunch program; and (3) subgrant priority to schools in which 75% or more of the students are eligible for such lunches.

Requires subgrantees to cover, from nonfederal sources, the costs of serving free breakfasts that exceed the assistance received under the school breakfast program.