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1
Preheat the oven to 350u00b0.
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2
Butter and flour the tube pan (10-inch).
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3
Make the cake: Put the butter and sugar in a bowl and cream together using the electric mixer on medium speed until fluffy, about 5 minutes.
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4
Scrape down the bowl.
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5
Add the vanilla and eggs, 1 at a time, beating for 20 seconds after each addition.
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6
Scrape down the bowl again.
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7
In another bowl, whisk together the flour, baking powder, baking soda and salt.
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8
Add this mixture to the butter mixture in thirds, alternating with the sour cream.
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9
Beat for 45 seconds after each addition, and begin and end with the flour mixture.
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10
Pour the batter into the prepared tube pan.
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11
Make the syrup: In a small bowl, stir together the melted butter, sugar, and cinnamon.
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12
Drizzle the syrup over the batter and with the blade of a knife or a skewer, swirl the syrup through the batter.
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13
Make the streusel: In a bowl, combine the sugar, cinnamon, and pecans.
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14
With a pastry cutter, cut in the butter, a few pieces at a time, until the mixture resembles coarse crumbs.
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15
Scatter the streusel over the batter in the pan.
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16
Bake for 50 to 55 minutes, or until a cake tester inserted in the center comes out clean.
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17
Remove the pan from the oven to a wire rack to cool for 15 minutes.
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18
Serve warm or at room temperature.
