In small bowl, combine sugar, flour, cardamom and nutmeg. Add butter; mix with fork until mixture resembles coarse crumbs. Stir in almonds; set aside.
For Coffee Cake:
Heat oven to 400ºF. In large bowl, combine flour, sugar, baking powder, salt, cardamom and nutmeg; set aside. In small bowl, whisk together milk, butter, egg and almond extract. Add to dry ingredients, mixing just until moistened. Stir in dried plums. Pour batter into greased and floured 9-inch square baking pan, spreading evenly. Sprinkle with Topping. Bake 25 to 30 minutes or until wooden pick inserted into center comes out clean. Serve warm.
Recipe by Three Different Directions at https://www.threedifferentdirections.com/almond-crumble-coffee-cake-california-dried-plums.html