A custom loop that displays one post on the Genesis Blog template

page_blog.php

<?php

// Template Name: Blog

remove_action( 'genesis_loop', 'genesis_do_loop' );
add_action( 'genesis_loop', 'newspro_do_custom_loop' );

function newspro_do_custom_loop() {

	global $paged;
	global $query_args;
	$args = array(
		'posts_per_page' => 1,
		'paged' => $paged,
	);

	genesis_custom_loop( wp_parse_args( $query_args, $args ) );
}

genesis();