Preheat oven to 350°.
Grease a 9 x 13 inch baking pan.
In a bowl, mix flour, baking soda, salt and cinnamon. Set aside.
In a large bowl, beat butter, brown sugar and honey with a heavy spoon until light and fluffy.
Add eggs, one at a time, beating until combined. Add applesauce. Gradually add flour mixture; beat just until combined.
Spoon batter into pan; smooth top. Bake until a toothpick inserted in the middle comes out clean, 30-40 minutes.
Cool in the pan 10 minutes. Turn out of pan onto a cutting board, baking sheet or wire rack; carefully turn cake top-side up. Cool completely. Dust with confectioners’ sugar before serving, if desired.