Ingredients:

Dry :
1 1/2 - cups Flour
2 teaspoons Baking Powder
1/2 teaspoon Salt
1/2  cup  Country Time lemonade
1 teaspoon Baking Soda
zest from 1 lemon

Wet:
1 cup yogurt
4 egg yolks
1/2 cup Canola Oil or melted butter
1 teaspoon vanilla extract
2 teaspoons Lavender Extract
4 beaten egg whites

2-3 cups Blackberries, fresh or frozen

Streusel Topping:
1 cup Flour
1/3 cup Sugar
1 teaspoon chopped Lavender Flowers
Zest from 1/2 lemon
1 teaspoon lavender extract
2 tablespoon butter

Directions:

I picked fresh Blackberries for this but you can use store bought or frozen.

1. FIrst, measure out the dry ingredients in one bowl.
Second, measure out the yogurt, oil, extracts and yolks in another bowl and mix well.
Third, Mix the wet ingredients with the dry just enough till you have a nice batter. (don't overmix)
Four, whip the egg whites until stiff..

2. Fold in the egg whites into the bowl of batter, just till its incorporated.

3. Prepare the 9 x 13 baking dish, grease the bottom and sides and then pour in the batter.

4. Mix the flour, sugar, lavender flowers, zest, extract, and butter till you get a nice little tiny pebbles.

5. Go through the berries and make sure they are sweet enough, These were picked at the peak of ripeness. If not, topss with a bit of sugar to sweeten.

6. Place the berries one by one evenly over the cake, then top with the Streusel.

7. Bake at 375 degrees for abut 20 min, and then turn down the heat to 350 degrees, and bake for another 15 to 20 min. until about 205 degrees or when a toothpick comes out clean

Serve with whipped cream or ice cream.