  We consider within QCD collinear factorization the process $p+p\to {\rm jet}
+{\rm jet} +X$, where two forward high-$p_T$ jets are produced with a large
separation in rapidity $\Delta y$ (Mueller-Navelet jets [1]). The hard part of
the reaction receives large higher-order corrections $\sim \alpha^n_s (\Delta
y)^n$, which can be accounted for in the BFKL approach. We calculate cross
section and azimuthal decorrelation, using the next-to-leading order jet
vertices, in the small-cone approximation [2].
