In a mixer with a paddle attachment combine flour, sugar, cocoa powder, baking soda and salt. Mix together eggs, egg whites and vanilla extract. Gradually add egg mixture to flour mixture blending on low. Toss almonds with chocolate chips then add to flour mixture and blend just until combined. On a well floured surface roll dough into 2 logs, 5 cm in diameter. Place on a greased sheet pan and brush with beaten egg. Bake at 350 degrees until light golden brown, about 30-35 minutes. Allow logs to cool 15 minutes then cut into slices on the bias. Place slices on a greased sheet pan and bake in a 350 degree oven until toasted, about 15-20 minutes. Cool. Store in an airtight container.