• Pre heat the oven to 350 F (175 C) and butter a 9" (23 cm) spring-form pan.  Line the bottom of the pan with baking paper, and butter the paper.

for the topping:

• In a large bowl, mix the flour, sugar and cinnamon together.
• Add the cold butter pieces, and use a fork or your fingers to mix it in, until the mixture comes together into coarse crumbs, then set aside.

for the filling:

• Using an electric mixer, beat the cream cheese until very creamy, then add the remaining ingredients and mix together until completely combined and smooth, then set aside.

for the cake:

• Whisk together the flour, baking powder and salt, then set aside.
• In a separate bowl, using an electric mixer, beat the butter until smooth and creamy.
• Add the sugar, and continue to beat until fluffy, then add the egg and vanilla, and mix well.
• Add the flour, alternating with the milk, and mix until combined.
• Spread the batter onto the bottom of the spring form pan, then spread the cream cheese filling over the batter.
• Scatter the berries over the top, then crumble the streusel over the berries.
• Bake in the oven for about an hour, or 70 minutes - until the streusel is golden and a toothpick test comes out clean, then remove to a wire rack to cool.
•  Serve warm or at room temperature.