Place a greased 9-in. springform pan on a double thickness of heavy-duty foil (about 18 in. square). Securely wrap foil around pan.
Place the first five ingredients in a food processor; cover and pulse until fine crumbs form. Gradually add butter, pulsing until combined. Press onto the bottom and 2 in. up the sides of prepared pan; set aside.
In a large bowl, beat cream cheese and brown sugar until smooth. Beat in the sour cream, Kahlua, flour and espresso powder. Add eggs; beat on low speed just until combined. Pour into crust. Place springform pan in a large baking pan; add 1 in. of boiling water to larger pan.
Bake at 350° for 55-65 minutes or until center is just set and top appears dull. Remove springform pan from water bath; remove foil. Cool cheesecake on a wire rack for 10 minutes; loosen edges from pan with a knife. Cool 1 hour longer. Refrigerate overnight.
Pour caramel topping over cheesecake. Refrigerate for at least 15 minutes. Remove rim from pan. Just before serving, sprinkle sea salt over caramel. Yield: 12 servings.