Heat oven to 350. Lightly spray 13x9!pan with crisco.
In med bowl brownie mix,oil,water and eggs. Spread batter in pan and set aside. In large bowl beat cream cheese with elect mixer until fluffy. Add milk and peanut butter. Beat until smooth. Stir in 1 cup of the toffee bits. Spoon mixture over batter. Spread evenly.
Bake 30-40 min or until cheesecake is set and edges are light golden brown cool on cooling rack 30 minutes refrigerate 40 minutes.
In small microwave bowl microwave chocolate chips and cream uncovered on high 40-60 sec or until chips are melted; stir until smooth. Spread over cheesecake layer. Sprinkle with remaining toffee bits. Cool completely, about 1 hour. Store covered in fridge.
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