Sift first 5 ingredients into a large bowl. Cut in the butter until mixture resembles course crumbs. Make a well in centre

Add sour cream to well. Stir until foarms soft dough. Turn onto lightly floured surface. Gently knead 4 to 5 times until dough comes together. Gently roll out on wax paper on dampaned work surface. Make a 8×12 inch rectangle. Brush dough with melted butter, leaving 1inch edge on 1 long side.

Combine brown sugar and cinnamon in small cup. Sprinkle on top of butter. Roll up fr covered long side, jelly roll style, using wax paper as a guide. Pinch seam against roll to seal. Cut into 1 inch slices, using floured knife. Lay slices flat, about 1 1/2 inch apart on greased baking sheet.

Bake in 400°F oven for 15 minutes until golden. Let stand for 5 minutes before removing to wire rack.

Icing: combine 3 ingredients in small bowl until smooth. Drizzle over swirls